2-stroke engine problem

[F5 Dave]

That Motul 800 is some of the best oil you can buy & is the biz for road racing or dirtbikes.

But it is not suitable for oil injection. Think that is Motul 600 (was 300 then changed, haven't kept up). The 800 is too thick & will clog in the injector.

[Max Preload]

Looks like detonation in the squish band.

That would be my position too.

[pritch]

I guess ill start takin the engine out the bike tomoro, and start documenting the internal damage. this is a cool hobby

Go far you will Luke. The force is strong in this one.

[Marls]

sweet... so me and richard discovered that detonation was the cause, crank and bottom end is fine amazingly enough, YAY,... cause by lean out, and the crap from the bottom of the fuel tank... i ran out of gas that day.
next ahead is sourcing the right parts...

According to the stamping, and some Japanese translating, i have the SP model HAHAHHAHA mean!!!!

but unfortunately the parts are hard to come by, or atleast the ones i found on ebay are for the year above mine. meaning that the YPVS is electroniclly controlled and mine is machanical. sigh (can forsee a long head ache of searching for the right part ahead)
I need a Cylinder head - 3xv11 y-2, Cylinder 3xv10 y-2, piston, and the gaskets, o-rings, and piston rings for a top end rebuild.

HAD a look at the other piston, and shess sweet. hahahaha. so, if i am lucky i can hav it running as soon as get my hand on these parts

[Kickaha]

I need a Cylinder head - 3xv11 y-2, Cylinder 3xv10 y-2, piston, and the gaskets, o-rings, and piston rings for a top end rebuild.

Interesting thing with the 3XV is that all the TZ race parts bolt straight on, you could have a 80hp road bike of course it means a rings every 250km and pistons every 500km

[Sketchy_Racer]

That Motul 800 is some of the best oil you can buy & is the biz for road racing or dirtbikes.

But it is not suitable for oil injection. Think that is Motul 600 (was 300 then changed, haven't kept up). The 800 is too thick & will clog in the injector.

What he said. Get some spectro gold injector two stroke oil.

Now, remeber to pull your carbs apart and clean them, because i'd say that the crap from the bottom of your tank has blocked the jet. a simple running out of gas would not cause that damage, it is prolonged lack of fuel, causing detonation that has done that. Hence i would pick that the jets in the carb are blocked.

Only a 5 min job (well, maybe a bit more, but you get my point) and it could save you from doing the same damage to all your new parts when you get them.

Cheers,

-Glen

[k14]

I know the head is pretty stuffed but it may be machinable. Go find a good 2 stroke tuner and they may be able to restore the head to its former glory. Hard to say though. A piston kit should be relatively easy to come across. Go to the local yamaha shop.

[Marls]

Interesting thing with the 3XV is that all the TZ race parts bolt straight on, you could have a 80hp road bike of course it means a rings every 250km and pistons every 500km

lol, that is interesting, but i am not lookin for a race bike being a learner and all... its quite fast as is... I rode my friends gsx250r the other day, and well.... i am not liking the gutless four-strokes at top end aye...
where can you find TZ parts in anycase, just for future knowledge

[bimotabob]

Hi

Does yours have o-rings for head gaskets?
Are the power valves gullitone type or rotating?

Yamaha do all the parts you just have to identify the model specs.

The CDI is restricted and you can't easily change it to give it the full power as it's digital.

Cheers