Trust me, you are NOT alone on this!!
107" problems/issues
There ARE no base gaskets used for a 107, they use O-Rings like stock builds do. If folks use too much lube during assembly... that crap WILL leak out because the cylinder studs are OUTSIDE of the o-ring. It usually DOES stop after awhile.
IMHO... 107 is simply too big and takes away too much material from the liners, but I am alone in this thought, I guess
IMHO... 107 is simply too big and takes away too much material from the liners, but I am alone in this thought, I guess
Last edited by stupid_rope; Feb 11, 2013 at 11:00 AM.
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Road Warrior
Joined: Dec 2010
Posts: 1,699
Likes: 7
From: New Jersey
On another note; im also trying to figure out why there are so many more posts on the 107 vs the HD Stage 4 kit. Since Im looking at that kit as well since I love my dealership and its 15min from the house vs a 2k mile round trip to FM.
Last edited by BrownSanta; Feb 11, 2013 at 04:20 PM.
Tourer
Joined: Dec 2012
Posts: 393
Likes: 0
From: Northwest OH
There ARE no base gaskets used for a 107, they use O-Rings like stock builds do. If folks use too much lube during assembly... that crap WILL leak out because the cylinder studs are OUTSIDE of the o-ring. It usually DOES stop after awhile.
IMHO... 107 is simply too big and takes away too much material from the liners, but I am alone in this thought, I guess.
IMHO... 107 is simply too big and takes away too much material from the liners, but I am alone in this thought, I guess.
Road Master
Joined: Apr 2010
Posts: 824
Likes: 2
From: O'fallon IL
No problem with my 107 except getting the tune correct. I went through three different tuners to get it correct. You can build a big engine but if the tune isn't correct it'll be your worst nightmare.
Seasoned HDF Member
Joined: Dec 2007
Posts: 8,341
Likes: 713
i dont bore good cylinders unless i have too,cams is it for me unless i have to go in for another problem.then its weld the crank bump up comp w\releases,porting and lots more cam, if the cylinders are good even then i don't bore.
The 107 build has proven to be reliable and robust. I built mine last winter, 10.75 compression, tw8 cams, se throttle body, ported heads and clutch upgrades. It's a stump puller, and is much, much stronger than the stage II 103 that it replaced.
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Tourer
Joined: Nov 2012
Posts: 421
Likes: 71
From: Hayward Ca
The only issue I have is the gas mileage. I went from close to 50 mpg on my 96" motor to the high 30s now depending on how I ride. I really consider mine a pretty mild build. Runs great and makes some great numbers (108hp/125tq) but the mileage sucks.
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