Klemm Research Tri-Z 350

[Old 179]

Dirt Wheels January 1986:
Article on a 85 tri-z with a big bore (350cc) conversion. Used a 38 flat side Mikuni smooth-bore to a 40. Had a Trinity 6 inch extended swingarm. Center R/L cases had to be machine to take the new cylinder.
Was shown in the sand dunes. Wander if our sand buddies ever has seen one of these or heard of these. Possible they may not have sold many! That makes three different bores for the tri-z. 200 debore, 250, and now 350. Any others????

[03 ORANGE SHEE]

i too have heard of this 350 z, never seen pics, nor do i know what rod they used to stroke it, but id love to find out!

[RideRed250R]

never seen a 350 tri-z... seen about every other thing tho... seen a banshee with a tri-z front end
was pretty bitchin
Adam

[Darius1502]

I have that article. I know its possible. The cylinder could be re-sleeve could'nt it to about 320 or so.

Would a piston from another YZ work? For example, YZ 400 (the old two stroke). I know they make 300 kit pistons for the new Yz's. The only issue is port timing. I don't know much about how this could be done....but I can't believe that some of the smarter folks have not already done this. Also I though someone would have put a 2000 or newer YZ 250 engine the Tri Z.

[Old 179]

i too have heard of this 350 z, never seen pics, nor do i know what rod they used to stroke it, but id love to find out!

No other rod was mention.

[MTS]

I have herd Rumors of a 380 Tri-z running around here...yet to see it tho.

[03 ORANGE SHEE]

darius, could you please print the article for me and the rest of 3ww to read?? THANKS!

[Dammit!]

My Z is alledgedly a 300 but I haven't pulled the top end to verify it yet.

[Billy Golightly]

Someone down here has a 300cylinder but hasnt done anything with it...

[Mosh]

I have that article. I know its possible. The cylinder could be re-sleeve could'nt it to about 320 or so.

Would a piston from another YZ work? For example, YZ 400 (the old two stroke). I know they make 300 kit pistons for the new Yz's. The only issue is port timing. I don't know much about how this could be done....but I can't believe that some of the smarter folks have not already done this. Also I though someone would have put a 2000 or newer YZ 250 engine the Tri Z.

stay tuned folks. sprock racing is making my TRI-Z a 310cc kit.when he gets the specifics dialed in,this kit will be available from him for purchase.along with the coolheads

[Darius1502]

stay tuned folks. sprock racing is making my TRI-Z a 310cc kit.when he gets the specifics dialed in,this kit will be available from him for purchase.along with the coolheads

I'll get to scanning that article. I will be about a week or so.

I'll find this thread an post it.

Wow a 310 cc kit...I like that idea!!

[Tyler]

I remember reading that article. I also remember a mechanic who purchaed the kit after reading the article. I remember it was a lot of modification to the motor. I also remember rideing it once and being amazed at how much power and torque it had everywhere. It was also quite expensive. I also remember it would eat the Banshee when it first came out by a large margin. There was a reason it used a +6 swingarm. lol. Klemm Research did a lot of cool things back in the day. Does anyone remember the tri-z motor in the early quadracer chassis? a very near true bolt in. The Z motor made a lot more power and was much more reliable. The Suzuki was really fast with that set up.

[Fox250R]

I got it in one of my older mags i would guess 87 88 ish...PIcs and everything! Looks MEAN!

[gasmask]

in 1995 i bought a big bore kit for my 86 ytz from trinity. i paid $410.00 for it. that was the new sleeve, piston kit, port matching and head mod. i had to sent tnem the head to re'cc it because i could not crank it. then i only weighted about 130 lbs. then i got in some trouble and my silly a__ wife sold my shi_. but trinity did make a big bore kit for the tri-z. that i know for sure.

[Tri-Z 250]

I'd give Harry a call at Trinity Motors, he is the old Yamaha Big Bore expert out West. My guess is he didn't make the swingarm and he did the motor work. He may have built the bike, but I know he doesn't make swingarms. He would have sub out the swingarm fab work. He makes some fast motors and up into about 8yrs ago he didn't make pipes. A Trinity swinger, seems like you might have your facts mixed up, but if anyone has a Big Bore kit Harry would.