124 in stock cases - Harley Forum

rmewrench · #1 07-19-2009, 07:33 AM

I havent completely searched this forum for this issue, but I want to share my woes about 124 in stock cases. I recently bumped my 2004 FXD (Super Glide) from 95 to 124 ci. I installed a S&S flywheel assembly 4 5/8 stroke with S&S pistons and cylinders. I machined the cases myself. I assembled the engine per S&S assembly instructions. My bike is fuel injected and while on the dyno getting tuned after proper breakin miles the motor died. After getting the bike back to the shop and up in the air I found my CPS(crank postion sensor) was trashed. After pulling the front cylinder I found both of my oil misters were gone. It looked like a bomb went off in my lower end. After a few phone calls to S&S it was determined that when using stock cases for a 124 build using S&S compnets you have to run S&S oil misters do to piston to mister interference. Even after final assembly, I turned the motor over by hand and didnt find any unusual noises or interference issues. I was fortunate that for somereason the flywheel assembly instructions that came with my flywheel was not the correct instruction sheet for my flywheel and S&S warranteed all my parts. If you have the knowledge and capability to machine the cases yourself, note that the bottom portion of the piston actualy travels past the counter bore of the cylinder. I had assembled my lower end and was checking clearances to find i had to disassemble it to machine the cases further to compensate for piston travel. Please learn from this.

unclepsycho · #2 07-19-2009, 12:23 PM

Welcome to the forum,

Thanks for that detailed description of your motor problem. Glad that S&S did right by you and you got the motor back together.

stick around, I'll bet you can help out with other problems that come up with our bikes.

welcome from sunny california.

shovelmike · #3 07-19-2009, 07:24 PM

Welcome to the forum, rmewrench. Thanks for the very important and informative post. Stick around, we'd love to have you as company.