Sprocket Change

[rc74racer]

I'm considering going up two teeth in the rear when I replace my chain this winter on my 98. I was wondering if anyone has found adverse affects from doing this. Seems to be plenty of rpm there for it. Right now I'm at 5000rpm at an indicated 75mph and experience no buzz or vibration whatsoever. I know my rpms will go up but is there any buzz or vibration associated with this change? I would love to get the added acceleration with this change but I don't want to sacrifice any ride comfort.

[KC-10 FE]

I find that my bike vibrates the least at about 6000-8000 rpm. You should have no problem whatsoever with this change. I have not done this mod yet but its on my list, right after new tires. I plan on +2 teeth in the rear with a DID x-ring chain. I ride with a guy who has a 2002 and he went +1 in th rear and he was very happy with the change. He did it specifically to be able to outrun my 00. He should have gone +2, he can catch me but we run neck and neck. I think this VTEC nonsense should be dumped on the next VFR.

8) RIDE WELL 8)
HWORTH

[Rumblefish]

I've got a 1 down on the front & 1 up on the rear...

Loads of low end torque and very quick acceleration..

Still hit 165mph on the speedo (@ almost 11K RPM)

Cruising at 85-90mph, RPM's at 6500 or so...vibration not too bad.

RF

Have any of you guys (or girls) out there heard of a 520 conversion for the 98. If so what brand? Also I am going to go up 2 in the rear also, any spocket brand reccomendations?

Yes. I just installed a 45T steel Sprocket Specialists on my 2001. It makes a difference by closing up the ratios between gears. Around town speeds are easier to control as the rpms are a bit higher; Gear change seems to be smoother. The sluggish flat spot area (4.5-5.2K rpm) is diminished because of the lowered overall ratios.
Sprocket was $34. plus $6 shipping.
http://www.sprocketspecialists.com/html/honda7.shtml

Scott

[Thrash1]

When you go -1 front and +1 in the rear did you have to change the chain lenght or did the stock 106link chain have enough adjustment?

[SAFE-T]

Originally Posted by Tom Annese

Have any of you guys (or girls) out there heard of a 520 conversion for the 98. *If so what brand? *Also I am going to go up 2 in the rear also, any spocket brand reccomendations?

Got my 520 conversion from Moto-Heaven (Phil) on eBay. Good stuff and decent price.

It's a small point, but since we average a post every six months around here, isn't the chain on 98 - 01's 108 link

[Thrash1]

I though it was 106links.... But anywho.. do you yeally get any benifit from a 520 conversion on a VFR? I thought the limiting factor would be the rear sproket since it's a SSS Arm? Inquireing minds would like to know.

T

[MP_Simmons]

Originally Posted by Rumblefish

I've got a 1 down on the front & 1 up on the rear...

Loads of low end torque and very quick acceleration..

Still hit 165mph on the speedo (@ almost 11K RPM)

Cruising at 85-90mph, RPM's at 6500 or so...vibration not too bad.

You see the same on the (optimistic) speedo, but that value is meaningless. Your change lowered the overall gearing ~ 8 %, so you have to spin 8% more revs to match the original speed.( the speed sensor is on the countershaft ) Or the same revs generate 8% less speed.
Even on a VFR you can't have your cake and eat it too.
RF

[Thrash1]

Done... -1F and +1 rear... It feels great. It was cold out so I couldn't really see how well it done on my normal twisty roads.. I also Installed a set of DP HH+ Pads up front... A much improvement over stock.

[macmorgan]

If at all possible, I would go up on the front to increase chain life and then calculate how many teeth you need to go on the rear to achieve the same ratio.

By decreasing the front sprocket, you're forcing the chain to turn a tighter circle and wear out sooner ;) ;)