Help or opinions on this issue.....STILL NOTHING!!!!

[RubberSalt]

what are the valve stem clearances? Are they sticking at all when heating up?
Are the valve spring binding?
Is the valve adjustment to tight?
is the head warped? Is the cylinder warped?'
Ring condition is a question to. I a ring sliding around/broken?

I hate to say this, but at this point.. I'd remove the engine and tear it apart and inspect everything as it went together. This can only be a few things, but until they are checked, you can rule them out as a problem. With the rings being a possibility, That's a tear down.

Ignition timing would have to be correct if it was all et the same. spark confirmed.
Fuel issue - carb is clean, gas is new to you. Doesn't sound like fuel though.

I'd inspect valve lash for starters. Odds of a broken ring is possible after a good run, it would seal up. After cooling It wouldn't be able to seal.




Just laying my thoughts out here. Painful to see a post like this.

[Dirtcrasher]

I beat the snot out of all my motors but I maintain them.

The RX went to TF last year with no issues. Then New York, couple rides in NH and then I got hurt at Jerrico SP? Never started it again until a month before TF and it ran super; I only run VR1.

The motor was completely torn down yesterday. The valves were placed in a collet in my lathe and face and stem runout were checked. Because this has a hardened cam in it and after what had happened, I pulled them to check them and they ar AM springs with TI retainers. I used my valve spring compressor, popped in the valves and poured gas in the upside down head, no leak. So, after more inspection, rings weren't sticking and I reassembled. So much compression without the decomp cable and nothing.

Right now it's in my shop with compression again, maybe it's the full moon

Frustration sailed away a day ago and I focused on the old 350X and the 200X (man do I hope that thing runs!!)

Anyway, Hope to see some of you at TF, I'll run a rear plate stating "DC" so you can come and bust my balls

Thanks guys!! Can't say you guys didn't help, plenty of good information in this thread!!

[beets442]

When I changed my clutch I had my trike on its side to make it easier to put back together and had the seal leak/seep into the flywheel/stator side. Got mine to run but not very well. Cleaned it up,changed seal runs great.

[6speedthumper]

I beat the snot out of all my motors but I maintain them.

The RX went to TF last year with no issues. Then New York, couple rides in NH and then I got hurt at Jerrico SP? Never started it again until a month before TF and it ran super; I only run VR1.

The motor was completely torn down yesterday. The valves were placed in a collet in my lathe and face and stem runout were checked. Because this has a hardened cam in it and after what had happened, I pulled them to check them and they ar AM springs with TI retainers. I used my valve spring compressor, popped in the valves and poured gas in the upside down head, no leak. So, after more inspection, rings weren't sticking and I reassembled. So much compression without the decomp cable and nothing.

Right now it's in my shop with compression again, maybe it's the full moon

Frustration sailed away a day ago and I focused on the old 350X and the 200X (man do I hope that thing runs!!)

Anyway, Hope to see some of you at TF, I'll run a rear plate stating "DC" so you can come and bust my balls

Thanks guys!! Can't say you guys didn't help, plenty of good information in this thread!!

Heck yeah, lots of folks pulling together (and their hair, lol) to give suggestions. I really can't wait to find out what the problem is, because this has me stumped as well. Being that everything checks out, what else is there to make it have good compression on one kick and not the next? God, I wish I had it in front of me.

[RubberSalt]

is it possible that the timing chain is stretched and not seating the valves correctly?

[6speedthumper]

You ever get this figured out, Dc?

[Dirtcrasher]

I am still cleaning and organizing after Trikefest.

Jason Hall got that 200X running so good that I'm focusing on that for now.

All my money is on this: Found lots of carbon on the head and piston; I bet there is carbon in the ring grooves but I was so dead set on valves I didn't pull the jug (MY BAD!!). Clock was ticking so I had to MOVE on what was stuck in my head.

I have a ported head for it and a 39mm FCR carb, so I'll tear into it soon.

I'll definitely post up the results and thank you everyone for your help!

I must be about 2 sizes too large on the main jet.....

[danbur55]

lots of carbon, maybe some flaking off then holding valve just enough to lose compression guessing you have an answer or at least possibilities

[shortline10]

I would just pull start that puppy and make it run !
The piece of trash will remove it's self .
I have seen this before on the 350x