I use a good, but very conservative Indy for my major bike work. I am considering having my cylinders bored out to 107" this winter because Momma wants to get the heads / cylinders Diamond Cut. ("Well gee honey, if you really want the Diamond Cut I guess I can get the cylinders and heads done to make it easier...") Anyways my Indy says boring to 107" does not leave enough strength in the cylinders especially at the bottom. he recommends new juggs if I want to go to 107".

I know that many performance shops like Fuel Moto, Drago's and Hillside (to name a few) say there is no issue boring your cylinders to 107". I decided to ask you the folks who actually own bikes with 107" cylinders.

Have you had any problems caused by your cylinders? If not how many miles have you put on since you had the work done?

Thanks for you help....

 

Done this early spring with a little over 7000 miles on my Fuel Moto installed and Dynoed 107". No problems in the least, runs smooth great mileage and tons of power !

 

34000 miles on my HQs 107 rocker box leak at 32000

 

I have over 5000 on mine and it still runs like it did when I brought it home!!

 

I've got about 5K on my 107 Road Glide. It has Axtell cylinders with matching pistons and uses the stock TC88 crank and cases. 121h/132t Uses the stock heads but they have the Silver Bullet porting job by Skip's Cycles.

 

16,000 miles on my FM 107-'09 RG. It's always run hot, but warmed up quite a bit with the thinner cylinders. I also had some starting issues after the engine heat soaked at fuel stops. (kickback/grinding) Installed the SE compensator which took care of the vast majority of the problem and then the addition of some of Jason's fans (Wards Parts Werks fcs fans) the took care of the rest. Other than these few problems it's been trouble free.

 

I understand that the cylinder liners are replaced rather than re-bored.

 

HQ 107 with over 10,000 miles. No problems at all. Pulls like a horse. No regrets here. I think the ones having problems need to consider having their bike re tuned. Not having a good tune will cause a lot of problems.

 

I went with Rev Performance 107, just over 5k and loving it.

 

same here...around 3k and no regrets