another tri z project

[pcs]

in the search of MO POWAH. i decided to go with a yz250, work the bugs out, then go with a esr 325 kit. unfortunately since im working about 3 hrs away from home. i cant work at the pace it would like. here are pics of the donor. Issues i can already see is no lights, exh exits on the other side, kickstarter direction, and carb boot is angled. im going to weigh the engines and get some side by side pics. more to come.

[Red Rider]

The tecate kid did a very similar project a few years back, but he never posted with a ride report on the power, as he was working out some suspension issues.

http://www.3wheelerworld.com/showthread.php/183305-If-Yamaha-made-a-new-Tri-Z-250

[El Camexican]

Awesome build! Looking forward to following your progress. :beer

[pcs]

thx for the link, im thinking of getting some seat time with the oem cylinder before going to b.b. esr 325 bb their reeds and pipe. also a straight carb boot.

[Red Rider]

You're welcome. Looking forward to the progress reports.

[ps2fixer]

Should be an interesting build. Does the YZ250 engine have no lighting coil in the engine? Do you have a service manual for the bike, if so I'd love a digital copy. If it does have a lighting coil, it should be 1, 2, or 3 wire, 1 and 2 should be 1 phase (normal AC), and 3 wire should be 3 phase. I'd assume if it has a lighting coil it will be single phase though. I don't have the tri-z manual in front of me, but pretty sure it's also single phase.

I might be able to help with a custom harness on this project assuming you're mounting electrical parts in the Tri-Z stock locations. If you're not interested that's ok too, I'll try to help with what I can, just don't think I have the YZ manual. Talking about the YZ, what year is it?

Sadly, I don't really know the Yamaha engines so well, so can't really help with ideas for parts like the intake issue. I suspect the kick start problem will be a bit of a challenge, you think it will clear the rear wheel? Might just have to remove the rear fenders to start it. Maybe it would be possible to push start it lol.

Good luck with the build though

[Red Rider]

And now the tecate kid's Tri-Z is for sale: http://www.3wheelerworld.com/showthread.php/188276-Modern-Tri-Z-250-for-sale

[oldskool83]

Thats gonna vibrate a good bit up front at bars with that YZ motor

[pcs]

got both motors out, going to get some weights when i get a chance

[pcs]

tri has no kicker on, has carbon reeds, and a cool head. yz has factory steel reeds, head, and kicker and no lighting coil.

[6spdls1z28]

Can't wait to see this project

Sent from my XT1635-01 using Tapatalk

[yaegerb]

Out of curiosity....why change the power plant?

[pcs]

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Out of curiosity....why change the power plant?

more hp in stock form, will switch to an esr big bore and yz250x wide ratio tranny

[pcs]

some measurements pics

[pcs]

more pics of yz250

[pcs]

and some pics, couldn’t put all on one post