Time to change wheels and ...
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@calum said in Time to change wheels and ...:
Grab yourself a forged Wiesco piston and a set of chromium rings.
can't find Wiseco ( one ring ?) piston for my model. But in PJME I have find Wossner piston ( 2 rings) , they are good I think, also forged (?)
Do you know if in PJME there Wiseco piston for the DT R ?
waiting answer from this site . http://www.paramimoto.com/pistones/343-wiseco-piston-yamaha-2-tiempos.html#/piston-dt_125_75_76_684m05600
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Hello friends !
Finnaly I've recived the piston. While they still fix the cylinder, I am reading carburation manuals and cleaning the Mikuni. I'll buy carburetor jet kit from 180 to 250.
I have noticed that the Yamaha piston rings are different while the Wossner ones are the same:
The Small End Bearing is 17mm ( the one that was put ) but the original bearing for Yamaha piston is 19.5 mm, so is very important replace it ?
And I see that the Wossner piston does not have holes that lubricate the gudgeon pin:
( it might be a good idea to do them? although I do not think so ) )
I have a base gasket but the Genuine Base Gasket it is made of metal (aluminium?) , so It is highly recommended put the metal one ?
uf a lot of questions but thank you in advance . :man_biking_tone1:
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OEM gaskets are far superior, but Athena gaskets are perfectly good. You MUST use either genuine or Athena for the head gasket. The base gasket doesn't matter.
Be sure to measure the piston ring end gaps on those wossner rings. I have never had a set that were perfect, they've always needed fettling.
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@yegor said in Time to change wheels and ...:
http://www.2strokeengine.net/gordonjennings/twostroketunershandbook.php
I have read this and I would say read something else after reading it to put information in a better order for understanding
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@declan ok thanks, I think the same. But in PJME you can find the Genuine Yamaha base gasket and is the same that I have , made of metal ( I think steel )
http://www.pjme.co.uk/acatalog/4FU-11351-00.jpg@Calum thx , I will pay attention to ring end gaps. And have bought the Athena head gasket and the original yamaha water pump radial shaft seal.
@terry-tz Thanks , will try read it in English ( I'm from Spain) , and find some literature in spanish.
Now I have disassembled the carburetor and I have understood much better how it works and how they connect the holes. this video helped me a lot:
Chicho Lorenzo ( Lorenzo's father MotoGP)
https://www.youtube.com/watch?v=niNn0LZESfgMy questions are. Our Mikuni carb ( TM 28 ) main original jet is 180 ?
in this webpage you can see specs and the main jet is 180 .
-> https://www.japanbaiku.com/mikuni/mikuni-tm/mikuni-tm28. Now I have seen that I have 240 all this time , without problems. With the Romeu exhaust will try with 250/260. BUT this jet :
https://www.japanbaiku.com/image/cache/data/chicles_tornillos/kys-00b-500x500.jpg <--- ralenti/starter jet ? the original is 15 . will try 17.5where do you buy jets kit ? www.japanbaiku.com is a little bit expensive.
Thanks in advance !
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Hello, I don't know if is good idea to write in this thread . Today I was checking the oil pump and I realized that the color of the oil changed: it has a suspicious color )
( I have put a transparent tube to check the oil flow)
I think it's because of oil seal or o'ring
11. O-RING
-- 13. OIL SEALWHat do you think ? Thanks in advance
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@calum said in Time to change wheels and ...:
pipe
you mean that if the material the tube is made of is the right one ? the #3 in the picture.
I put the tube yesterday to check the pump, later I will put the original. I'm going to add oil to the gas tank. 100 ml of oil for 5L gas. ?
with new cilinder and piston ...I started the bike yesterday after installing the piston