Gen 4 CBR undertail attempt .....

SLOVFR · 04-21-2008, 01:36 AM

Well while the old girl was down I decided to play muffler man. I bought a 05

CBR under rail exhaust, a 2004 R1 under tail exhaust, and Tori gave me his bent

Gen 6 exhaust. With all this I figure I should be able to come up with

something. So I decided I like the CBR so far, plus the R1's are just too big. I

got a mock up here to show you. I am waiting on the ext5ra lower tail light

piece to show up so I can hack on it. For now I am trying to get the

clearance which I dont have. It seems the Gen 4 with the top mounted

caliper makes the axle sit at the top of the eccentric. So my next step is to

do the counter sunk brake caliper bolt and pivot the axle. I may have to

ditch the hugger, we will see. Any thoughts, suggestions, comments are

welcome!

yoda6669 · 04-21-2008, 06:39 AM

I like it. Just needs a smaller tailight like u said. U indeed need that clearance in between the tire and the muffler.

derstuka · 04-21-2008, 07:48 AM

Sorry Bri....this is where our likeness seems to separate. I think that a single undertail exhaust looks exactly like butthole. Everytime I am behind a CBR I see this big butthole staring right at me....I figure that bikes shouldn't have a butthole

.... I hate them on CBRs, or what not. Gotta be two undertail, or stick to the side. IMO of course.....nice work though.

Oh, and you are probably gonna bake your arse as well from the heat....but then again, it is your bike, and I say do whatever makes you happy!

Seattle · 04-21-2008, 08:20 AM

I like the idea. I just don't see how your gonna have enough room for a license plate.

WhiteKnight · 04-21-2008, 08:36 AM

I tried that on my 3rd gen. The tire kept rubbing the muffler. I even went so far as to order an automotive exhasut tip (dual tip of course), and try that. Sounded awsome and was loud as all get out, but there still was not enought clearance. I wish you lots of luck in this project.

Nitrousva · 04-21-2008, 09:37 AM

I think it looks great! Good luck.

Robert

Pearl-93 · 04-21-2008, 09:38 AM

Just a thought...
As I too was contemplating a dual tip undertail pipe over the winter for my
3rd Gen.

Would a tail riser do the trick?
Thurn (I think) the German company offers quality tail risers for the 4th Gen on Ebay and their website. Gives you an additional 30mm of clearance.

Would be almost another 1.25" of clearance above the rear tire.

I was going to do this, but the 3rd Gen riser is a little more complicated and $$$$ as opposed to the 4th Gen.
4th Gen riser is around $65. if I remember correctly.

-S

RVFR · 04-21-2008, 09:41 AM

Hmmm, Very interesting. I'll be holding my judgment when she's done. keep us updated, looks like this one could pan out?

SLOVFR · 04-21-2008, 10:43 AM

Quote:

Originally Posted by derstuka

Sorry Bri....this is where our likeness seems to separate. I think that a single undertail exhaust looks exactly like butthole. Everytime I am behind a CBR I see this big butthole staring right at me....I figure that bikes shouldn't have a butthole

.... I hate them on CBRs, or what not. Gotta be two undertail, or stick to the side. IMO of course.....nice work though.

Oh, and you are probably gonna bake your arse as well from the heat....but then again, it is your bike, and I say do whatever makes you happy!

Im with you but I dont have the $$ to shell out on the small dual carbon cans I would love to have under there. If some come up on Ebay for cheap I can always go back in for some more playing. Untill then get use to looking at my Butt hole CornHolio

Seattle · 04-21-2008, 11:26 AM

As for the plate, what's the plan?

So are you guys saying there is a setup small enough to fit up under there and it's just a matter of $$$

If I could get a pipe to fit up under mine, I'd pay the cash to do it.

SLOVFR · 04-21-2008, 04:52 PM

Once I get it into position I can have the plate under the exhaust no problem. Ill build a nice aluminum bracket.

SLOVFR · 04-27-2008, 11:59 PM

Well, I played around with the exhaust a bit more today. I took out my caliper bolt and turned my eccentric 180 degrees. I also took off my hugger as it was usless with the eccentric in this position. Two problems I see with the flipped ec centric -
1. the chain is riding on the top guide ( no test ride just on side stand )
2. if it gets a bit loose, chain can start to touch the center stand ( not a problem by adding 1/2 inch bigger rubber stopper.
So I turn it back and without the hugger I have about 3 -3 1/2 inches of clearance, I don't think this will be enough. I would order the Thurn tail riser links, but I think it will put the chain in the same position. So for now I am still fiddling with it while I wait for my Honda goodies to get here and put the bike back together.

SLOVFR · 05-06-2009, 11:46 PM

Thurn Tail riser on order....project still in the works! Im determine to get it this time! With a few mm from the 929 shock (sending to Jamie for spring upgrade), Thurn riser and proper muffler placement and massaging, it should work....stay tuned.

jay956 · 05-07-2009, 12:18 AM

Quote:

Originally Posted by SLOVFR

Thurn Tail riser on order....project still in the works! Im determine to get it this time! With a few mm from the 929 shock (sending to Jamie for spring upgrade), Thurn riser and proper muffler placement and massaging, it should work....stay tuned.

i got a 929 shock on my 93 from jamie also. much better than stock, does ad a little bit of height too, which goes well with my lowered front end. had to crank down the preload and dampening to get it to stop bouncing though (and im only 170lbs).

SLOVFR · 05-07-2009, 11:39 PM

Ok I added a Poll as I wanted some opions on which route to go before I get too deep.

Here are My options:

CBR EXHUAST

Honda 6 Gen OUT

6 Gen IN

V/H Carbon Muffler - Will take bent tip off and be straight or just open:

Derstuka votes dont count as he does not like buttholes :)

SLOVFR · 05-08-2009, 05:42 PM

You guys are really delaying this for me...

drewl · 05-08-2009, 06:40 PM

Gen 6 in.
looks the cleanest and coolest. But that CF one prolly sounds cooler.

NorcalBoy · 05-08-2009, 08:02 PM

I was going to stay out of this, because you didn't give a "none of the above" option in the poll, but you went and pressed. I will quote Ghost by saying this about the undertail 5g exhaust idea: "It's pretty hard on the eyes".

SLOVFR · 05-08-2009, 09:03 PM

Is there a way to lock 6th gen owners out?

SLOVFR · 05-08-2009, 09:07 PM

By the way Im doing this to show off that $250.00 8 spoke Im putting on!

jay956 · 05-08-2009, 09:15 PM

i like the way the gen 6 pipe follows the triangular shapes of the tail. but that carbon one looks like something off a jet, in a good way.

NorcalBoy · 05-08-2009, 09:57 PM

Quote:

Originally Posted by SLOVFR

Is there a way to lock 6th gen owners out?

Just post another 500 photos of your track day.

NorcalBoy · 05-08-2009, 09:59 PM

Quote:

Originally Posted by SLOVFR

By the way Im doing this to show off that $250.00 8 spoke Im putting on!

The first thing people will notice is the jethro'd exhaust.....

SLOVFR · 05-08-2009, 11:18 PM

Quote:

Originally Posted by NorcalBoy

The first thing people will notice is the jethro'd exhaust.....

Your just jealous because you got gaping holes where your nice fitting pipe use to be

NorcalBoy · 05-08-2009, 11:26 PM

Quote:

Originally Posted by SLOVFR

Your just jealous because you got gaping holes where your nice fitting pipe use to be

Oh boy am I! Good luck Brian and I hope it works out well for you. I'm sure you will figure out something.

jay956 · 05-08-2009, 11:46 PM

i voted for the carbon, but i would change it to the 6 gen in after looking at it twice.

JTC · 05-09-2009, 12:14 AM

From the side view the 6th IN looks better but from the back the 6th OUT looks better.

SLOVFR · 07-04-2009, 12:26 AM

Ok just a quick update that the deed is DONE! With the help of Tori I finished her up tonight. Part CBR Part Triumph, and alot of hard work. Here are some pics along the way.
I cut off the center supports and made some cardboard template for the aluminum panels.

I cut off the donut part of the stock exhaust and used an up pipe from a 6th gen exhaust and a 45 adapter pipe from Kragens.

drilled some holes to mount the muffler to the stock CBR 600rr mounts

Relocated the rear master cylinder to straight up above under the rear cowl

Had a welding shop weld the aluminum panels all together for strength, Tori welded on a rod to have a new center stand stop and welded the up pipe to the 45 degree pipe. Some BBQ black paint it was was done!

Now I need a drink!

casinoguy92 · 07-04-2009, 08:30 PM

Nice job I just finished up my undertail on my gen3 i started where you did and had the clearence issues so i went complete one off.

mello dude · 07-04-2009, 09:03 PM

Nice fab job! ----- I guess if its a butthole then it has to pass gas. :-)

MD

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View Poll Results: Which one looks best?
CBR	4	22.22%
Gen6 Sticking Out	3	16.67%
Gen 6 Set In	6	33.33%
V/H Carbon Fiber	5	27.78%
Voters: 18. You may not vote on this poll

04-21-2008, 01:36 AM	#1 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	Gen 4 CBR undertail attempt ..... Well while the old girl was down I decided to play muffler man. I bought a 05 CBR under rail exhaust, a 2004 R1 under tail exhaust, and Tori gave me his bent Gen 6 exhaust. With all this I figure I should be able to come up with something. So I decided I like the CBR so far, plus the R1's are just too big. I got a mock up here to show you. I am waiting on the ext5ra lower tail light piece to show up so I can hack on it. For now I am trying to get the clearance which I dont have. It seems the Gen 4 with the top mounted caliper makes the axle sit at the top of the eccentric. So my next step is to do the counter sunk brake caliper bolt and pivot the axle. I may have to ditch the hugger, we will see. Any thoughts, suggestions, comments are welcome! Last edited by SLOVFR; 04-21-2008 at 01:38 AM. Reason: pics

04-21-2008, 06:39 AM	#2 (permalink)
yoda6669 Senior Member Join Date: Mar 2008 Last Online: 10-28-2009 09:01 PM Location: DaLlAs, Tx - Find Me! My Ride: 2002 HoNdA vFr800 w/t MoDs: PAIR vAlVe BlOcKeD - BMC fIlTeR - PCIII W/t O2 ElIm. - HoMeMaDe FeNdEr ElImInAtOr - OEM eXhAuSt BaFfLes ReMoVeD - ChRoMeD sPiKe HaNdLeBaR eNdS - VFR lOgO cHrOmEd ReSeRvOiR cApS - BoLt-On FrAmE sLiDeRs - TrOjAn MiRrOrS - ViStA cRuIsE. View my Photo Gallery Posts: 194 Thanks: 0 Thanked 4 Times in 3 Posts	I like it. Just needs a smaller tailight like u said. U indeed need that clearance in between the tire and the muffler. __________________ "Do it, or do not. There is no Try." Master Yoda yoda6669 (Jack of all Trades) - Proud Member Sixth Gen Militia - 1st VTEC Battalion

04-21-2008, 07:48 AM	#3 (permalink)
derstuka Me soooooo horny... Join Date: Jan 2007 Last Online: Yesterday 11:59 PM Location: San Diego, CA - Find Me! My Ride: 1998 Honda VFR800FI View my Photo Gallery Posts: 4,223 Thanks: 51 Thanked 217 Times in 152 Posts	Sorry Bri....this is where our likeness seems to separate. I think that a single undertail exhaust looks exactly like butthole. Everytime I am behind a CBR I see this big butthole staring right at me....I figure that bikes shouldn't have a butthole .... I hate them on CBRs, or what not. Gotta be two undertail, or stick to the side. IMO of course.....nice work though. Oh, and you are probably gonna bake your arse as well from the heat....but then again, it is your bike, and I say do whatever makes you happy! __________________ ~Jason San Diego Riders click here >>>> San Diego County Area Riders (SCAR)

04-21-2008, 08:20 AM	#4 (permalink)
Seattle Senior Member Join Date: Mar 2008 Last Online: 10-22-2009 08:57 AM Location: Seattle My Ride: 2002 RC51 / 1990 750FL / 1975 CL 360 View my Photo Gallery Posts: 195 Thanks: 0 Thanked 2 Times in 2 Posts	I like the idea. I just don't see how your gonna have enough room for a license plate.

04-21-2008, 08:36 AM	#5 (permalink)
WhiteKnight Moderator Join Date: May 2006 Last Online: 11-05-2009 11:02 PM Location: South Central Ky - Find Me! View my Photo Gallery Posts: 2,415 Thanks: 6 Thanked 29 Times in 27 Posts	I tried that on my 3rd gen. The tire kept rubbing the muffler. I even went so far as to order an automotive exhasut tip (dual tip of course), and try that. Sounded awsome and was loud as all get out, but there still was not enought clearance. I wish you lots of luck in this project. __________________ http://www.nrwhiteknight.net

04-21-2008, 09:37 AM	#6 (permalink)
Nitrousva Senior Member Join Date: Jan 2008 Last Online: Yesterday 06:03 PM Location: Richmond My Ride: 1993 VFR 750 1975 CB750/1110cc 1974 CB500 Posts: 121 Thanks: 1 Thanked 5 Times in 5 Posts	I think it looks great! Good luck. Robert

04-21-2008, 09:38 AM	#7 (permalink)
Pearl-93 Senior Member Join Date: Jun 2007 Last Online: 09-03-2009 02:29 PM Location: Elkridge, MD My Ride: 1993 Honda VFR750F (Pearl Crystal White) Posts: 191 Thanks: 0 Thanked 0 Times in 0 Posts	Just a thought... As I too was contemplating a dual tip undertail pipe over the winter for my 3rd Gen. Would a tail riser do the trick? Thurn (I think) the German company offers quality tail risers for the 4th Gen on Ebay and their website. Gives you an additional 30mm of clearance. Would be almost another 1.25" of clearance above the rear tire. I was going to do this, but the 3rd Gen riser is a little more complicated and $$$$ as opposed to the 4th Gen. 4th Gen riser is around $65. if I remember correctly. -S __________________ RIDE it like you STOLE it....

04-21-2008, 09:41 AM	#8 (permalink)
RVFR Uber Guru Join Date: Jan 2006 Last Online: Yesterday 09:48 PM Location: Olympia Wa. - Find Me! My Ride: 97 VFR750 View my Photo Gallery Posts: 4,172 Thanks: 157 Thanked 115 Times in 99 Posts	Hmmm, Very interesting. I'll be holding my judgment when she's done. keep us updated, looks like this one could pan out? __________________ Getting you where you belong..... before it's too late. http://media.putfile.com/Gazelle www.loopsies.com Most Fun your Dog can Have

04-21-2008, 11:26 AM	#10 (permalink)
Seattle Senior Member Join Date: Mar 2008 Last Online: 10-22-2009 08:57 AM Location: Seattle My Ride: 2002 RC51 / 1990 750FL / 1975 CL 360 View my Photo Gallery Posts: 195 Thanks: 0 Thanked 2 Times in 2 Posts	As for the plate, what's the plan? So are you guys saying there is a setup small enough to fit up under there and it's just a matter of $$$ If I could get a pipe to fit up under mine, I'd pay the cash to do it.

04-21-2008, 04:52 PM	#11 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	Once I get it into position I can have the plate under the exhaust no problem. Ill build a nice aluminum bracket.

04-27-2008, 11:59 PM	#12 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	Well, I played around with the exhaust a bit more today. I took out my caliper bolt and turned my eccentric 180 degrees. I also took off my hugger as it was usless with the eccentric in this position. Two problems I see with the flipped ec centric - 1. the chain is riding on the top guide ( no test ride just on side stand ) 2. if it gets a bit loose, chain can start to touch the center stand ( not a problem by adding 1/2 inch bigger rubber stopper. So I turn it back and without the hugger I have about 3 -3 1/2 inches of clearance, I don't think this will be enough. I would order the Thurn tail riser links, but I think it will put the chain in the same position. So for now I am still fiddling with it while I wait for my Honda goodies to get here and put the bike back together.

05-06-2009, 11:46 PM	#13 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	Thurn Tail riser on order....project still in the works! Im determine to get it this time! With a few mm from the 929 shock (sending to Jamie for spring upgrade), Thurn riser and proper muffler placement and massaging, it should work....stay tuned.

05-07-2009, 11:39 PM	#15 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	Ok I added a Poll as I wanted some opions on which route to go before I get too deep. Here are My options: CBR EXHUAST Honda 6 Gen OUT 6 Gen IN V/H Carbon Muffler - Will take bent tip off and be straight or just open: Derstuka votes dont count as he does not like buttholes :)

05-08-2009, 05:42 PM	#16 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	You guys are really delaying this for me...

05-08-2009, 06:40 PM	#17 (permalink)
drewl Philosphical Adviser Join Date: Nov 2007 Last Online: Yesterday 10:48 PM Location: Susanville, Ca - Find Me! My Ride: 2000 VFR 800 fi View my Photo Gallery Posts: 4,118 Thanks: 126 Thanked 248 Times in 187 Posts	Gen 6 in. looks the cleanest and coolest. But that CF one prolly sounds cooler. __________________ Shop Steward:Chat Hooers Union, Local 151 Ministry of Activity and Participation

05-08-2009, 08:02 PM	#18 (permalink)
NorcalBoy Uber Guru Join Date: Aug 2007 Last Online: Today 09:21 AM Location: Earth - Find Me! My Ride: Is White View my Photo Gallery Posts: 2,035 Thanks: 41 Thanked 261 Times in 201 Posts	I was going to stay out of this, because you didn't give a "none of the above" option in the poll, but you went and pressed. I will quote Ghost by saying this about the undertail 5g exhaust idea: "It's pretty hard on the eyes".

05-08-2009, 09:03 PM	#19 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	Is there a way to lock 6th gen owners out?

05-08-2009, 09:07 PM	#20 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	By the way Im doing this to show off that $250.00 8 spoke Im putting on!

05-08-2009, 09:15 PM	#21 (permalink)
jay956 Senior Member Join Date: Jan 2009 Last Online: Yesterday 10:33 PM Location: Caroline County, VA - Find Me! Posts: 558 Thanks: 25 Thanked 27 Times in 26 Posts	i like the way the gen 6 pipe follows the triangular shapes of the tail. but that carbon one looks like something off a jet, in a good way. __________________

05-08-2009, 11:46 PM	#26 (permalink)
jay956 Senior Member Join Date: Jan 2009 Last Online: Yesterday 10:33 PM Location: Caroline County, VA - Find Me! Posts: 558 Thanks: 25 Thanked 27 Times in 26 Posts	i voted for the carbon, but i would change it to the 6 gen in after looking at it twice. __________________

05-09-2009, 12:14 AM	#27 (permalink)
JTC Senior Member Join Date: Dec 2007 Last Online: 10-31-2009 06:28 AM Location: SOCAL - Find Me! My Ride: '06 VFR800 Interceptor View my Photo Gallery Posts: 281 Thanks: 739 Thanked 7 Times in 6 Posts	From the side view the 6th IN looks better but from the back the 6th OUT looks better. __________________ http://vfrworld.com/photos/data/503/vtecbadgexsmall.png

07-04-2009, 12:26 AM	#28 (permalink)
SLOVFR Uber Guru Join Date: Oct 2006 Last Online: 11-02-2009 08:29 AM Location: Pismo Beach Ca. - Find Me! My Ride: 97 vfr 750 View my Photo Gallery Posts: 1,869 Thanks: 60 Thanked 85 Times in 64 Posts	Done! Ok just a quick update that the deed is DONE! With the help of Tori I finished her up tonight. Part CBR Part Triumph, and alot of hard work. Here are some pics along the way. I cut off the center supports and made some cardboard template for the aluminum panels. I cut off the donut part of the stock exhaust and used an up pipe from a 6th gen exhaust and a 45 adapter pipe from Kragens. drilled some holes to mount the muffler to the stock CBR 600rr mounts Relocated the rear master cylinder to straight up above under the rear cowl Had a welding shop weld the aluminum panels all together for strength, Tori welded on a rod to have a new center stand stop and welded the up pipe to the 45 degree pipe. Some BBQ black paint it was was done! Now I need a drink! Last edited by SLOVFR; 09-03-2009 at 10:46 PM.

07-04-2009, 08:30 PM	#29 (permalink)
casinoguy92 Junior Member Join Date: Jun 2009 Last Online: Yesterday 07:23 AM View my Photo Gallery Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	Nice job I just finished up my undertail on my gen3 i started where you did and had the clearence issues so i went complete one off.

07-04-2009, 09:03 PM	#30 (permalink)
mello dude ProGeek Wackjob Anomaly Join Date: Jan 2006 Last Online: Yesterday 11:43 PM Location: Southwest Ohio - Find Me! My Ride: '98VFR800 and '99 Valkyrie - one to go fast, one to go slow, not necessarily in that order. View my Photo Gallery Posts: 2,367 Thanks: 22 Thanked 88 Times in 80 Posts	Nice fab job! ----- I guess if its a butthole then it has to pass gas. :-) MD __________________ Member 5th Gen Brotherhood http://vfrworld.com/forums/fifth-gen...llos-mods.html http://vfrworld.com/forums/brake-tir...ceptor-ss.html <----------- Why Be Normal? ----------->

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