Yamaha_chop
Fabricator Extraordinare
I thought about it, but my megasquirt isn't set up for sequential injection, it's batch fire only.
-
Enjoy XS650.com? Consider making a donation to help support the site.
XS650.com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going.
8 Pack Clutch Mod
- Thread starter Punkskalar
- Start date
Punkskalar
Hugh's HandBuilt
I ride several bikes, lots of Japs and a few American bikes... When you adjust the XS clutch just right, the shifting is wonderful compared to an HD Product
The only mod that might help the shifting would be something that opens the pressure plate farther so there is less drag.
I compared the amount the pressure plate on the XS and my H-D. The H-D opens about 3/8 inch, the XS about 1/8 inch.
A pull clutch conversion might do that, one that pulls the pressure plate open from the right side instead of pushing it from the left.
Leo
I compared the amount the pressure plate on the XS and my H-D. The H-D opens about 3/8 inch, the XS about 1/8 inch.
A pull clutch conversion might do that, one that pulls the pressure plate open from the right side instead of pushing it from the left.
Leo
plattey
XS650 Addict
I have the 750 kit from mikes, port n polish, and roundslides, and had to switch to the barnett clutch springs from MMM. I'm due for carpal tunnel with these stiffer clutch springs! This 8 clutch plate mod is a necessity! Thanks Punkskalar for your work!
August
XS650 Member
Once I get my clutch off my engine I plan on joining the 8 plate club if I can. I may not be making the hp like some here, but there are still plenty of benefits regardless. Plus I know the clutch will still be there with some more spirited driving as well.
plane_ben
XS650 Junkie
I had two Guzzis, one a 1970, the other a 1997. The XS shifts like butter compaired two those two.
flyguyeddy
XS650 Member
- Messages
- 20
- Reaction score
- 0
- Points
- 1
hey hugh, how did you hold onto the pressure plate when you machined it? i cant seem to think of a way to hold it in the 4 jaw lathe i have here at work. thoughts?
Punkskalar
Hugh's HandBuilt
flyguyeddy
XS650 Member
- Messages
- 20
- Reaction score
- 0
- Points
- 1
THAT is a fantastic idea! now im going to use your ideas and market a product!
just kidding
but really, i hadnt thought of that. props!
just kidding
but really, i hadnt thought of that. props!
TwoJugs
Excess XS
I've got some updates - but I'm in the middle of moving shops, trying to buy a house, and offering new services... I'll do some more testing and get back to ya
Make sure the house has a big garage, or the garage has a house near by.
tonyc
XS650 Guru
The problem of hard shifting could stem from not having a real drive cushion like most bikes have on the rear wheel. The older British bikes had the same problem.
Last edited:
CSX66
XS650 New Member
Hi All, I just found this forum. Some great stuff on here!
Reading this thread made me go hunt through my old XS650 pics. I had a similar idea a few years back. Back in 2001 I was building a 919cc stroker motor and figured It'd need a decent clutch to take all the torque. Especially considering how easily the stock clutch would slip on a stock motor.
I had a few spare clutches on the shelf and mix and matched parts. I machined out the basket and the pressure plate to squeeze in an extra steel and friction to make an 8 plate. I don't have many progress pics of the build as I was pretty new to digital photography then (I think I was borrowing the camera from work).
I used some aftermarket kevlar frictions. Not sure what brand, they may have been Barnett. I know the springs I used are Barnett. Unfortunately I never got it all together and running as a 919. I was in a hurry to go riding and put a stock motor in. A while after that I injured my back and the bike got put away and hasn't been ridden since.
I'll be watching this thread to see how it works out.
I pulled the bike out the other day and dusted it off. I'm keen to give it a freshen up and get it going again. Had a few ideas for things I'd like to do different this time.
Cheers
Mike
Reading this thread made me go hunt through my old XS650 pics. I had a similar idea a few years back. Back in 2001 I was building a 919cc stroker motor and figured It'd need a decent clutch to take all the torque. Especially considering how easily the stock clutch would slip on a stock motor.
I had a few spare clutches on the shelf and mix and matched parts. I machined out the basket and the pressure plate to squeeze in an extra steel and friction to make an 8 plate. I don't have many progress pics of the build as I was pretty new to digital photography then (I think I was borrowing the camera from work).
I used some aftermarket kevlar frictions. Not sure what brand, they may have been Barnett. I know the springs I used are Barnett. Unfortunately I never got it all together and running as a 919. I was in a hurry to go riding and put a stock motor in. A while after that I injured my back and the bike got put away and hasn't been ridden since.
I'll be watching this thread to see how it works out.
I pulled the bike out the other day and dusted it off. I'm keen to give it a freshen up and get it going again. Had a few ideas for things I'd like to do different this time.
Cheers
Mike
bergoff
XS650 Addict
Hugh I was curious if you would ever offer an exchange process for stock basket and everything for a machined setup someday. I don't have access to a lathe and I would pry hurt myself if I did. I'm going to do a full top end rebuild this winter and will be running the je 700cc setup and want a clutch that will hold up.
www.specII.com now offer an 8 plate kit for the xs650. part # 29656, $75.00 USD. I haven't checked but I'm assuming that it's Alto 2.49 mm friction plates and standard steels.
Using the clutch modded to use 8 stock plates, Could you use 9 of those 2.49 Alto plates?
Leo
Leo
Yes. Stealing the measurements and methods from the other 8 plate clutch thread on here, Total stack height of the original 7 friction plates and 6 steels is 29.4 mm. 8 steels @ 1.4 mm = 11.2 mm, 9 frictions @ 2.49 = 22.41 mm, total stack height = 33.61 mm. Need to machine 4.2 mm from inside the clutch basket. To use the existing 8 plate method with original thickness friction plates requires 4.4 mm extra inside the basket. So a clutch modified as per Hugh's method will take 9 plates with room to spare.
