Only in the top of first does this happen. Under hard Accel. Would an s.e. diaphragm solve this problem?
Let me know your thoughts.......

 

Have you done recents mods to increase HP and TQ......?

Did you try adjusting the clutch....?

If it is properly adjusted, with no HP/TQ gains, and is starting to slip under load, that could be a sign that the clutch is wearing out...

A stiffer spring, in my opinion, would be a band-aide to hide that fact... While a stiffer spring may delay the inevitable, it will come at the cost of a harder clutch pull...

I would replace the clutch....

 

What oil are you using in your primary? How many miles on the bike and primary fluid? Start with the simple things.

 

101/112 hp-tq.......redline shockproof. Clutch is to spec. 25k

 

always that stuff in there ? maybe trans but not primary...i would get it out and run regular 20 50 dino or harley primary fluid.... start with that first... clutch should not go at 25 k under normal conditions

 

I decided to get new friction & diaphragm......don't want to open things up twice.

Thanks

 

What makes you think your clutch is slipping 'only in the top of first'? that is actually backward of any clutch slippage I've ever heard of.
If your clutch slips,you will notice it primarily in 6th,5th,and in 4th if it's really bad.

 

Rpm's go up and the bike stops pushing me forward. Guy next to me as a witness to it.
Yep. Every where else it's fine. About 4k until I shift. 2, 3, 4.....no problem holding.

Btw. Not shockproof......trans fluid. Sorry!

 

Your bike is running out of horsepower above 4,000 rpm,thus not pulling you forward as it did before it reached 4k.

 

Im sorry.....at 4k the trans slips to past 5k. Then 2nd thru 4th I shift just past 5k