takegawa 124cc big bore ?

[kenny9575]

I was wondering if any one out there has tried to use a takegawa superhead+r 124cc stoker kit for a crf 50 in a trx 90 or any pit bike parts made for the xr/crf 50s. If so what was used?

[Big Red Menace]

The superhead will work, but the crankshaft won't because the clutch end is different. If there's a way to use those cranks, like swaping clutches with 50 stuff, I don't know of it. As far as the cylinder goes there's a 114cc cylinder kit out there sold by several different places like Dr. Atv, trailbikes etc that with very minor case clean up goes right on. I bought mine from extremefourstrokes.com for $140 cylinder, piston and gaskets to my door.
That cylinder with a TBQ race cam from DR. atv for $30 and a #94 main jet got me a TRx that runs nice for not a lot of money.

[Dodge 1 Ton]

Did not find extremefourstrokes.com is this the correct link?

Thanks

[Big Red Menace]

Sorry about that, use www.extreme4strokes.com You'll find the 144cc kit in the chinese pit bike engine section.

[Dodge 1 Ton]

Thanks Big Red Menace I think I found what I am looking for.

[Rockslide]

Big Red,

What kind of cleanup did you have to do to get this setup? I looked at the site and appreciate the info, this will be one of my projects down the road for my sons stock TRX90. Thanks

[michmike420]

We ran a xr50 kitaco crank the last couple years,but you have to eliminate the centrifical clutch.it depends how skilled the kid is at riding it with no clutch.call rob at robs racing he knows how to do it.

[Big Red Menace]

Rockslide, When you remove the cylinder you will see two spots sticking out slightly near the upper two cylinder studs. Basically you're gong to make the hole in the cases for the cylinder to go through round.
When I installed mine, I stuffed a clean oily rag into the cases and ground those little tabs away with a dremel tool. To make it easier to get in there I unscrewed the cylinder studs. If you go on Dratv.com they have pictures of this too in the trx90 section.
Michmike, I've heard of this conversion. I don't know how, but I get the jist of it. Basically it's like a manual clutch but run with your foot. Does this work ok for mx? I could see this for flattrack working well. I don't know if my little guy is good enough to work that set up. I sure would like to get rid of that two clutch set up on mine though. On this small of an engine getting rid of that big rotating chunk of steel would have to really help acceleration.

[michmike420]

Yes it works excellent for mx. my daughter finished 5th in the 90 production Sr class at the nationals this year,using this set up.the setup just eliminates the cent. clutch,and uses a gear in its place.whoever does it for you make sure they have a provision for the swivel/oiler.It took Brittany my daughter a little while to get used to it,the main problum being that if you are to heavy on the rear brakes and lockup the rear tires it will stall the bike.From a horsepower standpoint,nothing else compares.Good luck.

[Dodge 1 Ton]

Any body had a problem with www.extreme4strokes.com? I placed a ordder and it has been 3 weeks. No reply to email at all.