Hey Harley Brethren,well I screwed myself on this one. when fuel moto tells you din't use synthetic in your primary: WELL DON'T but I tried and sure enough clutch did slip. So I boogied back and swapped it out like really quick. although I don't guess it was fast enough,because it still slips in 6th gear. If you creep up on your throttle,you can get her rolling above 90,but if you jump om it gap it open all at once yep it slip's dammit. Have adjusted the clutch,more then once,and it;s right on the money,and I figured I got this,but in 6th I don't. I'm thinking I might try and change my clutch tension spring first I have heard it through the grapevine this could be the problem,what are the gear-heads though's,please no *** kicking,I've done enough of this still am,so thought's will be fine,and appreciated.

 

If you change the clutch spring your going to have a much harder clutch pull. It's ok at first but gets annoying as hell in stop n go traffic. I tried that route and it just wasn't for me. I ended up going back with the stock spring and installing an AIM VPC. No more slipping no matter how hard you hammer on it. And I still run synthetic oil to boot.
https://www.fuelmotousa.com/i-208592...re-clutch.html

 

Well thank's Bro i'm going to order that baby,and I take it you have a fuel moto V-Twin,and you run synthetic oil in primary? Like i said look's rite down my alley. thanks again

 

Yessir I am running a FM 107. Destroyed 2 clutch cables with the heavy spring before I realized what was causing the issue.

 

So good to hear that,you are running synthetic in your 107. I was around this room when in 02; Harley was telling everyone to NOT run synthetic oil in their V-Twin because it would flat-spot their roller bearing's. Flash forward to today,and now they have their own synthetic, go figure. I have been a Amsoil Dealer for over 13 year's now,and it is a crying shame what they charge for Amsoil at the stealership. Anyway i did order the VPC from fuel moto,and can't wait to see how she'll run with all going to the rear wheel. What do you run in your primary???.

 

I run Mobil1 in all 3 holes and have done so for humpteen years without any issues.

 

I'm running the Energy One clutch with the extra plate and heavy spring. I have no issue with the heavy spring, but I have strong forearms. I called Energy one about oil and they had no issue with me running Amsoil synthetic primary fluid. They just said no synthetic engine oil. Most of the Fuel Moto 107 builds run the Aim clutc, I've never heard of an issue with it. .

 

SG,yea when I got my build from Fuel Moto,they told me first thing no synthetic in the primary;,which i disagree with because it;s so superior to a regular lubricant. Also being a Amsoil dealer i will go on the record and offer Amsoil product's to all member's on this website. I've done the something to the HOG chapter in Alexandria La,but here's the instalation inst off the link that bro SBates gave me: The Fuel Moto/AIM clutch is the most cost effective & most powerful kit available to upgrade your H-D stock clutch. Developed by Fuel Moto with a specific weight combination to suit our engine packages. Supports 130Hp/130Tq with OEM spring, or 150Hp/150Tq with optional heavy duty spring. Up to 7% reduce clutch lever effort. Up to 40% more additional pressure when locked up.

• 10 minutes installation (only '98 and later Big Twin models).
• Better clutch disengagement and feel than stock, Easier to find neutral.
• Fits behind a stock derby cover and primary cover. No modification required.

Note: Non-stock derby cover (including any special or '03 anniversary cover) and 3 holes derby cover may require a derby cover spacer. Fuel Moto recommends non- Synthetic primary lube.

Product Series

• AIM / Fuel Moto Custom Variable Pressure Clutch

notice last 7 words.

 

Me too. It wasn't what the spring did to my forearms, it's what it did to parts connected to the clutch on the outside of my motorcycle when I used one. Not good. I had the same results as Bates mentioned above, and other negative consequences in addition to. If you haven't had the HD spring for long, keep and eye on your cable and your clutch lever assembly.

 

my experience was the same. when I first got my 107, I tried to cut corners (cost) and go with the se spring. that lasted about a month before I got tired of it and went to the aim/vpc.