sorry bout asking questions on my first post, but i have a semi serious problem i believe. i just put a new bottom end on my bro in laws 87 warrior. i used the top end of his old motor and the bottom end is off of a 2000 model. i adjusted the valves and got the bike running. it would start up run fine then when u would cut it off u would have to wait 10 mins before it would crank again figured out that i had the timing off. reset the timing and readjusted the valves and that "fixed it". well i got on it and took it down the street and brought it back cut it off and restarted it bout 10 times and it ran fine. i took it back down the road and before i could get turned around it started acting like it was loosing power and then it just died and havent been able to restart it. sorry bout the post bein so long just didnt want to leave anything out.

if anybody has an idea it would be greatly appreciated
oh yeah one thing i forgot to mention is the old top end was just rebuilt before the bottom end threw the crankshaft through the case (showed it to the mechanic and he said it was the worst he had ever seen LOL)

 

Welcome to the forums! For some reason I think perhaps you are having an issue at the CDI box perhaps due to the different model parts.

 

thanks for the input if the it is the cdi box would that still have allowed the bike to run for a little. this is a question bc i have no idea. LOL this is actually the first time i have ever been into any 4wheeler motor and i have no idea about em.

 

tryed the cdi box off of my warrior which is a 98 still no luck still have no idea. Any input?

 

Does it crank and just not turn over or will it not try and start at all?

Usually mix and matching engine halves is a big nono. They wear differently in the different quads and it could cause the piston/crank to bind.

 

did not know that but it turns over just will not start up to fix that do i need to have the jug honed and a new piston put in? checked the compression and it has good compression dont know if that makes a difference like i said though it seemed to run fine when we got thte timing right it just wont start now and it didn't make any noise when it died it just kinda acted like it i left off the gas but i didnt.

 

whats the spark look like?

 

yes the spark is blue but when i pulled the tming cover off today it had jumped forward a lil bit i dont know what that was all about but i reset the timing chain back to top dead center but it still would not crank also checked the compression and it has great compression i still have no idea. any help would be greatly appreciated thanks

 

If yu have compression, and you have spark at the right time, the only other thing it could be is a fuel problem. Maybe there's trash in the carb that got in there when you had it apart, or some trash in the fuel tank got shook up when you had it off?

 

thanks for all the help guys i had it 180 out to begin with then i think i may have bent a valve i took it to my bike mechanic he is gunna pull the head tom and let me know he said hes almost thats what it is thanks for the help guys