ATC70 Clutch ?????

[shortline10]

As some of you know I just finished up a atc70 Build .
http://www.3wheelerworld.com/showthread.php/149681-ATC-70-All-tricked-out-Powroll-Old-school

I installed HD clutch springs and new plates and all was good for about an hour , now its starting to slip again so my question is ... what are other options other than the 3 disk set up and HD springs ? is their a aftermarket chinese clutch with maybe 4 disks that will bolt right in ?
This little motor makes allot of power so looking for somthing HD :mad: .

[Vealmonkey]

Not sure how old your son is, but maybe xl70 manual clutch? If not, you're going to have to start measuring different springs, maybe use valve springs for the clutch???

[shortline10]

My boy is 6 so it needs to stay auto for now and I was thinking of a better HD spring for sure .
If it's just my 45 pound son riding it the clutch would be fine and last forever probably but I just cant help myself to get on it :D :lol:

[Vealmonkey]

You're a bad Dad! LOL You have plenty to ride, let the lad rip, for goodness sake! LOL

[manbearpig]

Glad you posted this. I'm looking to build up a clutched 70. I have an xl70 and an s65 bottom end to work with. What bottom end did you use? I've heard of dimes under the springs for more pressure on em...

[manbearpig]

Looks like I misread the thread title. I see you're using the stock 70 bottom end, my bad

[shortline10]

Dratv sells the manual conversion kit for really cheap .
The HD springs I installed were a 1/4" taller than the ones removed (which were powroll I believe) and much stronger so maybe I need a better quality clutch plate ???? wondering if barnett makes plates for these ?



Glad you posted this. I'm looking to build up a clutched 70. I have an xl70 and an s65 bottom end to work with. What bottom end did you use? I've heard of dimes under the springs for more pressure on em...

[manbearpig]

Dratv sells the manual conversion kit for really cheap .
The HD springs I installed were a 1/4" taller than the ones removed (which were powroll I believe) and much stronger so maybe I need a better quality clutch plate ???? wondering if barnett makes plates for these ?


they gotta make em for the crf50 and all the lil chineese honda knock offs. dont 70 and 50 bottom ends closely resemble eachother?

[shortline10]

Found a barnett set up this morning but its a 2 fiber plate set up so i'm guessing the fibers/ steels are reversed from oem ?


they gotta make em for the crf50 and all the lil chineese honda knock offs. dont 70 and 50 bottom ends closely resemble eachother?

[shortline10]

Week end bump ..... Looking for a heavy duty cluch set up for the atc70 , whats every body using ?

[shortline10]

Little update , replaced the clutch plates yesterday with a Barnett set up and its still slipping at the higher rpms :lol:
Not sure what to do . Might go Chinese HD clutch .

[steve0196]

I'm running a Honda bottom, 88 kit, TB head with larger valves and cam (CRF style), 52 mm stroker and VM 26 carb. Stock clutch with HD springs and new disks lasted about 20 min. I put a TBW 0961 HD clutch assy from Tboltusa.com in it 2 years ago with no problems. Are you working on the Dunlap Poweroll 70 I tried to buy from you a year ago?

[shortline10]

Yes same motor .
Tore into it again and thought out of the "box" this time .
I just got back from a test run and finally got it .
Installed a set of HD atc90/110 clutch springs and BAM it hooks up with zero slipping :lol:
the atc90 springs are the same size just a little longer and much stiffer .


I'm running a Honda bottom, 88 kit, TB head with larger valves and cam (CRF style), 52 mm stroker and VM 26 carb. Stock clutch with HD springs and new disks lasted about 20 min. I put a TBW 0961 HD clutch assy from Tboltusa.com in it 2 years ago with no problems. Are you working on the Dunlap Poweroll 70 I tried to buy from you a year ago?

[steve0196]

Great!!
I'm working on a little different clutch setup. I put a manual clutch side cover on and left the auto clutch assy in. Works pretty good, but I've got a coupe bugs to work out. I need to put a foot brake on it. Works great on the hole shot and the auto makes a nice trail ride in rough terrain.

[big specht]

I just saw this thread ,that is what we were doing with the manual clutch we used out of the CT's when we converted from the atc clutch. And they were cheap cause you could always find a junk 110 for parts.