cbrman77
09-23-2009, 04:55 PM
Hello all,
I recently picked up a 1995 300ex as a beater for friends when they come over. I was told it was running before it was parked.
I cracked the top end and found out that it must have jumped timing. The two exhaust valves hit the piston bending the valves slightly and damaging the piston.
My buddy decided he wanted the quad and we traded some work for the quad. When we found out what the problem was, he wanted to go the cheapest route possible to fix it: Hone it, put oversize piston rings in, replace damaged valves and timing chain.
1. Where is a good place online to order aftermarket parts for quads? I have always ridden dirtbikes and streetbikes and the places i buy parts from don't sell quad parts.
What is your experience with honing the cylinder, putting slightly oversized rings in? The cylinder wasn't damaged, he honed it out already and wanted to get some rings once I had access to a micrometer to check the bore size.
For the timing chain, I was planning on changing the chain and both sprockets. Is that usually what is recommended is replacing all 3?
The gears don't look extremely worn, but i am not sure what they look like new so they could be shot. (I could snap a few pics if that might be helpful).
Also what about the piston. it is damaged from where the valves hit, but there are no holes. is it ok to use or should i get a new piston as well?
I purchased the honda service manual and read through it but it doesn't have much on changing the timing chain. Is there any how-to's around for the 300ex?
Where can i get new timing gears? I am easily able to find the upper and chain but no lower other than from honda for 100 bucks or so.
Thanks,
Steven
I recently picked up a 1995 300ex as a beater for friends when they come over. I was told it was running before it was parked.
I cracked the top end and found out that it must have jumped timing. The two exhaust valves hit the piston bending the valves slightly and damaging the piston.
My buddy decided he wanted the quad and we traded some work for the quad. When we found out what the problem was, he wanted to go the cheapest route possible to fix it: Hone it, put oversize piston rings in, replace damaged valves and timing chain.
1. Where is a good place online to order aftermarket parts for quads? I have always ridden dirtbikes and streetbikes and the places i buy parts from don't sell quad parts.
What is your experience with honing the cylinder, putting slightly oversized rings in? The cylinder wasn't damaged, he honed it out already and wanted to get some rings once I had access to a micrometer to check the bore size.
For the timing chain, I was planning on changing the chain and both sprockets. Is that usually what is recommended is replacing all 3?
The gears don't look extremely worn, but i am not sure what they look like new so they could be shot. (I could snap a few pics if that might be helpful).
Also what about the piston. it is damaged from where the valves hit, but there are no holes. is it ok to use or should i get a new piston as well?
I purchased the honda service manual and read through it but it doesn't have much on changing the timing chain. Is there any how-to's around for the 300ex?
Where can i get new timing gears? I am easily able to find the upper and chain but no lower other than from honda for 100 bucks or so.
Thanks,
Steven