Tri z 490 a Monster is born

[Triz250]

Just so you know I do appreciate what you're doing. I give all the Yamaha guys a hard time, right Nico? [emoji23]

Its all good. I love the site and the feedback. Can't wait to get you guys some video of this thing moving.

[El Camexican]

Here's one suggestion from the Internet. If you can find a place that has a reputation for fixing the detonation issues I'd send you head in. All in, all done including shipping shouldn't be over $200 bucks which is a lot less than a rod and piston and whatever else. Your call, but I wouldn't start it without at least a head mod and some big fat jets. If the timing is adjustable you may want to start off at full retard.

[3 Wheel Drive]

If you look close you can see Glamy at the dunes!

[Triz250]

Here's one suggestion from the Internet. If you can find a place that has a reputation for fixing the detonation issues I'd send you head in. All in, all done including shipping shouldn't be over $200 bucks which is a lot less than a rod and piston and whatever else. Your call, but I wouldn't start it without at least a head mod and some big fat jets. If the timing is adjustable you may want to start off at full retard.

I am looking into it. I have a couple of shops near me.

[fabiodriven]

You might also want to fire a compression release through the head while it's apart. They're pretty cheap and I think it's as easy as making hole in the head and threading it in.

[Shep1970]

Not your motor but check out this comp release, could it be be this easy? https://twistingthewick.wordpress.co...ase-by-wimmer/
Found it earlier thought i’d share
Shep

[yaegerb]

Not your motor but check out this comp release, could it be be this easy? https://twistingthewick.wordpress.co...ase-by-wimmer/
Found it earlier thought i’d share
Shep

I watched the vid.....So let me get this straight. If I install that on my cylinder a hot chick in a bikini shows up on my workbench? I don’t care if it works, I’ll take 10!!!!

[HondaRidr]

Awesome man! Last year I built a 84 atc480r. The big bore 2 strokes are something else!

Sent from my SM-G930T using Tapatalk

[fabiodriven]

Not your motor but check out this comp release, could it be be this easy? https://twistingthewick.wordpress.co...ase-by-wimmer/
Found it earlier thought i’d share
Shep

That's amazing!! I need to know more about that Wimmer unit! There's not much information about these that I've been able to find at all, but if it's that simple I need one of those. I was planning on drilling another hole in my cylinder head.

[Shep1970]

That's amazing!! I need to know more about that Wimmer unit! There's not much information about these that I've been able to find at all, but if it's that simple I need one of those. I was planning on drilling another hole in my cylinder head.

Well after some searching it looks like they discontinued them. I guess maybe it didn’t work so good, i should of searched before i posted- the item was a good thought but i guess to good to be true.

Shep

[jb2wheels]

.i like yami better then kawasuckme

blasphemy

[3Z with Fangs!]

I had a '80 YZ465 for a handful of years up until recently when I sold it. 2 words... Straight Nasty!