Upgrading the ol' Evo
Club Member
Joined: Apr 2011
Posts: 5,803
Likes: 7,830
From: SE Louisiana
The gear ratio on that bike is killing the performance, 25-36 primary, 32-65 final.
Add the six on top of that = turd.
IMO, I would,
Change engine srocket to 24 tooth(JP cycles,part # 603-130, $40),you'll need the Baker fat shoe, to make it work with the stock chain.
Either change to a 70t rear pulley, you'll need a 132t belt to go with that, or go with a 30t front pulley, not sure what belt for that, search the forums, it's in there somewhere.
This ratio change will let your cam, carb and ign mods come to life,
and
you might can actually use that sixth gear.
Edit, the fat shoe won't work with the older style adjuster,maybe the Baker fine pitch adjuster with fat shoe option, would work.
Add the six on top of that = turd.
IMO, I would,
Change engine srocket to 24 tooth(JP cycles,part # 603-130, $40),you'll need the Baker fat shoe, to make it work with the stock chain.
Either change to a 70t rear pulley, you'll need a 132t belt to go with that, or go with a 30t front pulley, not sure what belt for that, search the forums, it's in there somewhere.
This ratio change will let your cam, carb and ign mods come to life,
and
you might can actually use that sixth gear.
Edit, the fat shoe won't work with the older style adjuster,maybe the Baker fine pitch adjuster with fat shoe option, would work.
Last edited by Schex; Apr 23, 2013 at 08:57 AM.
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Road Master
Joined: Feb 2007
Posts: 741
Likes: 8
From:
My parts came in. I will let you guys know how it turns out when I finish installing.
To reiterate what you guys said, I think regearing the sprocket and pulley might be a good idea as well as an air cleaner. K&N? MaxFlow?
Where's the speedo located on these old Evo's? Does it get the reading from the front wheel or the rear? If it's the front then I'm not very concerned with regearing the bike.
To reiterate what you guys said, I think regearing the sprocket and pulley might be a good idea as well as an air cleaner. K&N? MaxFlow?
Where's the speedo located on these old Evo's? Does it get the reading from the front wheel or the rear? If it's the front then I'm not very concerned with regearing the bike.
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,332
Likes: 3,873
From: Upstate New York
'95 and earlier used a mechanical speedo drive off the front wheel.
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Road Master
Joined: Feb 2007
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The S&S Carb came with an air cleaner and the S&S teardrop cover. The filter looks similar to a K&N.
Last edited by jamesf0622; Apr 25, 2013 at 08:09 PM.
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Joined: Jun 2007
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From: Bedford UK
Intermediate
Joined: May 2008
Posts: 48
Likes: 0
From: western wi
[QUOTE=jamesf0622;11217088]How would that work if I'm changing out the gears? Will it affect the speedo and odometer?
Yes it will effect your speedo how much I don't know But there are fixes Dakota digital has a recalibration unit and there might be others
Yes it will effect your speedo how much I don't know But there are fixes Dakota digital has a recalibration unit and there might be others
Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Your certainly correct about the false neutrals but can be overcome with a lot of tweaking. The twinkie guys will say your going backwards with the Evo but won't be long before they start asking why the heck did they come up with something like the twinkie. Nothing like Evo exhaust
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Club Member
Joined: Apr 2011
Posts: 5,803
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From: SE Louisiana
Changes in the primary wont affect the speedometer, final drive changes will.
Changing the engine sprocket and chain will be the least expensive route.
A 23t would bring rpms at 70mph from about 2752 to about 3000,
close to a 3.17 final.
http://bakerdrivetrain.com/compensating-sprockets
http://www.bakerdrivetrain.com/oldge...os/rpmCalc.htm
http://www.bigboyzheadporting.com/Gearratio.htm
Changing the engine sprocket and chain will be the least expensive route.
A 23t would bring rpms at 70mph from about 2752 to about 3000,
close to a 3.17 final.
http://bakerdrivetrain.com/compensating-sprockets
http://www.bakerdrivetrain.com/oldge...os/rpmCalc.htm
http://www.bigboyzheadporting.com/Gearratio.htm