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j440

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Discussion starter · #1 ·
i just got my 143 big bore, race head and all that and i just put the piston on (i installed the 55mm crank too) and i put the rings on and all, slid the jug over and its not going down into the cases.. the 143 says its a bolt on and doesnt need case boring... any one have any ideas? i could be just completely blind and missing something but hell its been a long day of traveling..
 
Discussion starter · #5 ·
the trail bikes 143 with the race head



it only slides right up untill the sleeve touches the cases and then it wont go in.. im going to have to look at it after i eat im running on empty right now
 
88cc Honda's, 146cc 125GPX's, and 143cc KLX's all are crowding the limits of sleeve thickness and spigot-to-case clearance. Bigger is better, huh?



Is it a newer plated one, or a steel sleeved setup?

Spigot OD?



I'd bore the cases for you, free, but you gotta pull the sumbich apart again:(
 
All cases are not created equal thats for damn sure. I just put a yx together..07 cases with 08 jug..I took it apart three times to polish down the spigot to slide in the case...3rd time was a charm but that damn base gasket has got to be finagled so as not to get pinched...Slow and easy......:)
 
Discussion starter · #12 ·
i just mic'd the spigot and put the other end of the micrometer into the cases and its the same size pretty much. i don't want to bang the jug in but i think it'll slide in, that or like blackwood said, maybe polish it a tad to get that ceramic **** off.
 
Discussion starter · #18 ·
well i mic'd it again.. its most definitely to big. you guys think its just a messup with this cylinder?



im wondering if once TB is off their break i can just send it to them and get a new one considering it hasn't been used. anyone ever done that?
 
Discussion starter · #20 ·
you know its that close where i feel like trying to tap it in but i dont want to ruin anything and then find out i could have done something smarter.. haha



heres some pictures of how close it is



http://img10.imageshack.us/img10/262/143003.jpg

http://img172.imageshack.us/img172/7110/143004.jpg

http://img207.imageshack.us/img207/9652/143007.jpg

http://img149.imageshack.us/img149/3443/143006.jpg



question about the piston.. is that little hole supposed to be in there..? never seen that before.



http://img149.imageshack.us/img149/6789/143008.jpg
 
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