103cu Problem
Road Warrior
Joined: Apr 2010
Posts: 1,648
Likes: 37
From: Monroe, Louisiana
With more compression from the upgrade to 103 and the 255 builds more cranking compression than stock cam, you have a double need for the compression release. Starter and battery may also be weak, but you need the compression release with this combo. A cam with 240 degrees of duration has much more overlap and doesn't build as much cranking compression and start much easier.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
your advantage is- you understand how this stuff works....
there are just a few tricks with H-D's
---I believe there is a $35 toyota starter clutch that works. ( you can do a search for the part #- I believe the that forum member Dawg, shared that gem.
I'm lucky all my stuff just keeps on working- except the starter for the '53 is giving me trouble,
Mike
there are just a few tricks with H-D's
---I believe there is a $35 toyota starter clutch that works. ( you can do a search for the part #- I believe the that forum member Dawg, shared that gem.
I'm lucky all my stuff just keeps on working- except the starter for the '53 is giving me trouble,
Mike
Last edited by mkguitar; Aug 21, 2012 at 09:58 PM.
Seasoned HDF Member
Joined: Mar 2007
Posts: 66,948
Likes: 4,573
From: TOAK western branch
http://partsfinder.onlinemicrofiche....ARTER-ASSEMBLY
Seasoned HDF Member
Joined: Mar 2007
Posts: 66,948
Likes: 4,573
From: TOAK western branch
Cruiser
Joined: Jul 2012
Posts: 180
Likes: 0
From: ALABAMA
I had pretty much the same set up on my old bike.. 07 SG 103/255s .. started great until I did the upgrade..(about 500-600 miles until dealer could get it in to do it) then I would get the start to spin then clank, bang, kick back, kick the starter out and grind, bang spin... etc...... I started cranking the thing like it was an old carb bike, (give it just a thought of a twist on the throttle right as I was spinning) it and it would crank with no problem. (don't give it too much... it really doesn't like that) while the starter clutch may have been worn also, first I slapped the SE compensator on there and ended all the banging and kicking back/out. Since it fixed the problem I never looked at the starter.
Road Master
Joined: Apr 2011
Posts: 1,145
Likes: 98
From: Colorado Springs
Replace the compensator. You will sooner or later. Chances are, you won't need to do anything else.
I had pretty much the same set up on my old bike.. 07 SG 103/255s .. started great until I did the upgrade..(about 500-600 miles until dealer could get it in to do it) then I would get the start to spin then clank, bang, kick back, kick the starter out and grind, bang spin... etc...... I started cranking the thing like it was an old carb bike, (give it just a thought of a twist on the throttle right as I was spinning) it and it would crank with no problem. (don't give it too much... it really doesn't like that) while the starter clutch may have been worn also, first I slapped the SE compensator on there and ended all the banging and kicking back/out. Since it fixed the problem I never looked at the starter.
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