520 chain conversion...Problems?

Pearl-93 · 07-22-2008, 03:32 PM

Hey guys,

I just completed the 520 chain conversion w/ -1Front, +2 Rear (15/45) teeth on my 1993
It seemed slightly more peppy off the line but it seems there was a bigger trade off than I expected?

The bike revs higher ( thats ok)
The speedo seems to be inaccurate
the top speed seems to have dramaticly been reduced (said 105 in 6gear)
but the speedo is off because cars where passing me with readings of 95MPH
So I couldnt have been going that fast...more like 80-90 in 6gear
which is bad because before I wouldnt hit 6th gear until well over 100.

1. Is this correct? I didnt think that the trade-offs where is severe?
2. Is there some sort of speedo fix that the shop neglected to do?

Thanks
-S

Nitrousva · 07-25-2008, 03:25 PM

Yes, you changed the gearing, that's the trade off, better acceleration and less top speed.

derstuka · 07-25-2008, 03:27 PM

You need a speed-o-healer.

Pearl-93 · 07-25-2008, 04:41 PM

Where do I pick one of those up from...sounds like $$$$$

Pearl-93 · 07-25-2008, 04:50 PM

Well...

It appears I am S.O.L. , I can only find them from 94+ VFRs. (I have a '93.)
Anyone else know where to pick one up for a 3rd Gen.?

Looks like for now I'll just have to find the mark and over-compensate for the difference in MPH.

-S

derstuka · 07-25-2008, 04:52 PM

Around $100 bucks it looks like.

Here is some info:

Link >>>> Speedohealer

Buy Speedohealer

derstuka · 07-25-2008, 04:58 PM

Quote:

Originally Posted by Pearl-93

Well...

It appears I am S.O.L. , I can only find them from 94+ VFRs. (I have a '93.)
Anyone else know where to pick one up for a 3rd Gen.?

Looks like for now I'll just have to find the mark and over-compensate for the difference in MPH.

-S

According to the FAQ on the speedohealer website (HealTech Electronics Ltd. - Makers of the GIpro/ATRE and SpeedoHealer) it says it can be used on ALL (except some BMW vehicles, that need an adapter) vehicles that have a 3 wire speed sensor or two wire ground switch sensor.

You should be good to go.

Nitrousva · 07-25-2008, 05:06 PM

Pearl, another option would be to get the correct size sprockets and use the new chain. You could then eBay the old sprockets to recoup some funds. FWIW

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07-22-2008, 03:32 PM	#1 (permalink)
Pearl-93 Senior Member Join Date: Jun 2007 Last Online: 12-18-2008 11:36 AM Location: Elkridge, MD My Ride: 1993 Honda VFR750F (Pearl Crystal White) Posts: 191 Thanks: 0 Thanked 0 Times in 0 Posts	520 chain conversion...Problems? Hey guys, I just completed the 520 chain conversion w/ -1Front, +2 Rear (15/45) teeth on my 1993 It seemed slightly more peppy off the line but it seems there was a bigger trade off than I expected? The bike revs higher ( thats ok) The speedo seems to be inaccurate the top speed seems to have dramaticly been reduced (said 105 in 6gear) but the speedo is off because cars where passing me with readings of 95MPH So I couldnt have been going that fast...more like 80-90 in 6gear which is bad because before I wouldnt hit 6th gear until well over 100. 1. Is this correct? I didnt think that the trade-offs where is severe? 2. Is there some sort of speedo fix that the shop neglected to do? Thanks -S __________________ RIDE it like you STOLE it....

07-25-2008, 03:27 PM	#3 (permalink)
derstuka CrAcKbRaInEd MoDeRaToR Join Date: Jan 2007 Last Online: Yesterday 08:32 PM Location: San Diego, CA - Find Me! My Ride: 1998 Honda VFR800FI View my Photo Gallery Posts: 3,582 Thanks: 17 Thanked 124 Times in 87 Posts	You need a speed-o-healer. __________________ ~Jason San Diego Riders click here >>>> San Diego County Area Riders (SCAR) --------------------------------------------------- 1998 VFR800 Two Brothers CarbonFiber Slip-on ZG Double Bubble Oxford Hot grips BMC Air filter Thurn Motorsports Aluminum Chainguard Knurled Aluminum Footpegs

07-25-2008, 04:41 PM	#4 (permalink)
Pearl-93 Senior Member Join Date: Jun 2007 Last Online: 12-18-2008 11:36 AM Location: Elkridge, MD My Ride: 1993 Honda VFR750F (Pearl Crystal White) Posts: 191 Thanks: 0 Thanked 0 Times in 0 Posts	Where do I pick one of those up from...sounds like $$$$$ __________________ RIDE it like you STOLE it....

07-25-2008, 04:50 PM	#5 (permalink)
Pearl-93 Senior Member Join Date: Jun 2007 Last Online: 12-18-2008 11:36 AM Location: Elkridge, MD My Ride: 1993 Honda VFR750F (Pearl Crystal White) Posts: 191 Thanks: 0 Thanked 0 Times in 0 Posts	Well... It appears I am S.O.L. , I can only find them from 94+ VFRs. (I have a '93.) Anyone else know where to pick one up for a 3rd Gen.? Looks like for now I'll just have to find the mark and over-compensate for the difference in MPH. -S __________________ RIDE it like you STOLE it....

07-25-2008, 03:25 PM	#2 (permalink)
Nitrousva Member Join Date: Jan 2008 Last Online: 01-07-2009 03:37 PM Location: Richmond My Ride: 1993 VFR 750 1975 CB750/1110cc 1974 CB500 Posts: 81 Thanks: 1 Thanked 1 Time in 1 Post	Yes, you changed the gearing, that's the trade off, better acceleration and less top speed.

07-25-2008, 04:52 PM	#6 (permalink)
derstuka CrAcKbRaInEd MoDeRaToR Join Date: Jan 2007 Last Online: Yesterday 08:32 PM Location: San Diego, CA - Find Me! My Ride: 1998 Honda VFR800FI View my Photo Gallery Posts: 3,582 Thanks: 17 Thanked 124 Times in 87 Posts	Around $100 bucks it looks like. Here is some info: Link >>>> Speedohealer Buy Speedohealer __________________ ~Jason San Diego Riders click here >>>> San Diego County Area Riders (SCAR) --------------------------------------------------- 1998 VFR800 Two Brothers CarbonFiber Slip-on ZG Double Bubble Oxford Hot grips BMC Air filter Thurn Motorsports Aluminum Chainguard Knurled Aluminum Footpegs

07-25-2008, 05:06 PM	#8 (permalink)
Nitrousva Member Join Date: Jan 2008 Last Online: 01-07-2009 03:37 PM Location: Richmond My Ride: 1993 VFR 750 1975 CB750/1110cc 1974 CB500 Posts: 81 Thanks: 1 Thanked 1 Time in 1 Post	Pearl, another option would be to get the correct size sprockets and use the new chain. You could then eBay the old sprockets to recoup some funds. FWIW

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