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jb4020

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About jb4020

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    TT Newbie

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  • Location
    Pennsylvania
  1. jb4020

    crf 230 cam bearing loose

    i just got my new piston and rings and checked the end gap. The new top ring end gap is .016" and the old one is .107" the service limit is .020 so i guess they were worn out!
  2. jb4020

    crf 230 cam bearing loose

    Thanks again for all the help. I'll get it all together and see what happens.
  3. jb4020

    crf 230 cam bearing loose

    What are your thoughts with the valve seats? They dont look burnt etc. but maybe I'm missing something. Good to know a about the fork springs. Any idea what oil I should run in them? I read somewhere 10w oil, I have to replace fork seals so I need oil
  4. jb4020

    crf 230 cam bearing loose

    Yeah i hope it was a good deal. Its also got the upgraded front and rear BBR springs. I measured the ring endgap tonight per the manual and the gap is more than double the limit the manual states so i think the rings are my biggest problem. I was also planning on replacing valve stem seals.
  5. jb4020

    crf 230 cam bearing loose

    I paid $475.
  6. jb4020

    crf 230 cam bearing loose

    At first it just smoked all the time then after 5 min it would mostly only if I Rev,d it. I pulled the valves last night and I don't see scoring or burning on the valves or seats so irk. Also I'd like a better can I just don't want to put $200+ in cam, springs etc when the stock can is $70. Appreciate the help
  7. jb4020

    crf 230 cam bearing loose

    Sorry for the double post. Also is it worth he money for me to get a flex hone since the cylinder looks good, no scoring?
  8. jb4020

    crf 230 cam bearing loose

    I found the dimensions of the new bearing online and of looks like the can is the worn part so I think ill just get a whole new one. The previous owner did have an air filter by it had sand all in it and when I removed the Carb there was the same sand in the throat also. I assumed the sand caused the low confession but when I went to do a leakdown test I didn't have an adapter for the small spark plug hole. The cylinder itself is not scored at all so I'm hopeing it just needs piston and rings. I found the dimensions of the new bearing online and of looks like the can is the worn part so I think ill just get a whole new one. The previous owner did have an air filter by it had sand all in it and when I removed the Carb there was the same sand in the throat also. I assumed the sand caused the low confession but when I went to do a leakdown test I didn't have an adapter for the small spark plug hole. The cylinder itself is not scored at all so I'm hopeing it just needs piston and rings.
  9. jb4020

    crf 230 cam bearing loose

    Thanks alot thats what i needed to know. I'd like to replace just the bearing but i may need a new one. I bought the bike and it ran but smoked alot. The previous owner said he flipped it and it sucked in sand/dirt and then didnt run right. I pulled the engine, pulled the topend and checked everything. I would like to do high comp piston and cam but i dont really want to spend that much right now.
  10. I just bought an '04 crf230f that needed some topend work. This is my first bike (i'm 26) and i'm just want to put the stock piston and cam in it. My question is the cam bearing furthest from the timing chain slides on and off very smoothly by hand. That seems to be too loose to me, or should it go on very easy like that. I would like to not by a new cam but if i have to its not a problem. Thanks for any help
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