I found a mainjet similar to the picture above, the brand is honda No. 133 and 138 but not sure if the diameter hole equals to 1.33 and 1.38 mm. Acording to some comments from motrcycle forums 132 = 1.32 mm (mine was 132 and now is 1.58 mm). It costs about $9 dlls but not sure if they will help to solve the white plug.

Hola, I tried to ride my bike early this morning after the top end rebuild but had a problem. I turned on the bike but after 1 or 2 minutes there was thin white smoke possibly coming from the cylinder. I mean "possibly" because it was breezy and is difficult to spot the problem. Before watching the smoke, I smelled something burning and thought was a plastic but did not find any burned plastic. I am afraid is the piston or something inside the engine. I know the oil pump is working since there was some drops of oil coming from the cam sprocket cover (did not thigh enough the bolts). I am confuse since I followed the TW 200´s service manual recommendations and don´t know what to do. Could be the O-ring installed in the cyclinder? it´s not the original (yama) and probably burned out.

If you spilled some oil on the engine during the rebuild, it will burn off the first few times you run the motorcycle. Unless you notice an oil leak, this is probably the source of the smoke, and it will soon disappear. ;)

Spud, I lubricate with oil the piston, rings, and cylinder during the rebuild and as you mentioned this could be the source of the smoke (hopefully). Any critical signs or should I notice or pay attention before hitting the road? can I ride at the same speed I used to?

:thanks:

Yes, you will also burn the oil used to lubricate the cylinder and piston rings during installation. :)

I suggest you stay close to home for the first ten miles or so. ;) After that, you can ride the bike normally. :)

Congratulations on a successful rebuild! :D

Thanks, it took me about 2 months but it worth it (I only devoted about 2 or 4 hours a week).

I´ll be riding around the city before hitting the road.

How is the plug colour now?

Hey Hect any news on the TK jets? I have a Teikei MV30 which nearly identical to the MV28 that Spud and many others have put together ton of resources for.

After doing some mods that created a lean condition, I had my TK main"128" jet drilled out an estimated "couple sizes" by a local shop this week which helped a bit, but I will be ordering a variety of those Mikuni jets so I have numbers to work with.

Also, I saw that Sigma 6 jets makes jet performance kits for a variety Zongs and my SSR with TK, I have not asked them if they sell individual TK jets however.

Teikei jets are very hard, if not impossible to find. If you do find them, they will be expensive. :ohno: That's why the Yamaha TW200 owners and I have switched to the Mikuni jets. ;)

I have ordered all N102/221 sizes from 130 up to 137.5 from Rocky Mountain. I am hopeful the TK MV30 will like them.

Still white but using the original mainjet (used drill bit 1/16").

dh, I just installed a keihin 140 round jet today. This tue will ride and will let you know. BTW, I found a 130 and 138 but they did not match into the main nozzle. If the plug is still white will decrease one size (if I find it in other bike shops). I just learned that Keihin will have a store down in San Luis Potosi although will take a while until begin business (it is under construction)

http://www.keihin-na.com/company/keihin-de-mexico/

Saludos

Spud, the main jet 132 in of mv28 is equivalent to what keihin or mikuni size? The main jet does not have any mark on it only 132.

Saludos