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help needed!! rmz250 2004

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Hi guys, new to forum as Ive just bought an rmz250 2004

Well the prob is I bought this rm a few weeks ago, guy bumped it as he said it needs a service so wont kick or idle

(yeh I know alarm bells should have been ringing!

Anyway first call is a bike mechanics who said prob a valve issue but would need to strip for a nose. they call said barrel is scored

so it needs barrel piston and rings (bottom end just rebuilt before I had it) anyway a few weeks later I get a call to say

mechanic was going on hols but only had to put a few bits back on and was ready so we took it but after putting tank etc on

same prob wont kick (very little compression but i think they are like that) we bumped it and it fired up ran then stopped

so we parked it up and in the moring oil all over the place (couldnt see where it came from). put oil back in and tried to kick this time it backfired a few times

then we tried to bump and nothing.

Even though I havent been riding crossers for years (road bikes have been my bag for last few years) but me and a mate are planning to

do the hare and hound in monmouth in 2 weeks so im desperate to get this going so any help is appreciated!!!!!

mechanic is taking another look but not till next week. he said alves looked fine to him and was shocked she wouldnt start.

long story short im after some guidance or someone local to take a nose? (will pay for a fix) bike is getting fuel and spark.

Tony

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cheers for reply!!! Ahhh bugger, yeh im afraid he does know as he is a ktm mech. No one is fool proof so i guess double check valves then look to sort head? Is there anything else to double check before i get a head? Was once told bike will only backfire if valves or timing is out?

I hate it when threads r opened they solve d prob amd dont let others know so ill b keeping thread up to date.

Also is there much compression on these bike? My mech said not much?

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cheers for reply!!! Ahhh bugger, yeh im afraid he does know as he is a ktm mech. No one is fool proof so i guess double check valves then look to sort head? Is there anything else to double check before i get a head? Was once told bike will only backfire if valves or timing is out?

I hate it when threads r opened they solve d prob amd dont let others know so ill b keeping thread up to date.

Also is there much compression on these bike? My mech said not much?

You can't tell by pushing the kick start leaver down. You need a compression tester and my 08 has 215 psi with new top end.

Even if the valves are within spec. the head may need rebuilt. It would have to be in really bad shape to need replacing. New valve seats can be built.

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Its seems im better off going back to the drawing board with this, mech is not eager to sort due to family issues, so Im going to find another one who can take a fresh look and check everything again?

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ok guys its been a few months but bike came out of shop yesturday. Its had a complete rebuild but still has problems. It now kick starts but wont idle, Ive run out of funds so removed it from shop but as I took it them said they did find that the hot start plunger wasnt sitting correctly )basically was loose) and they think this might have been the problem all along. Ive ordered the part and it should be here soon. Just wondering if anyone thinks this could be causing the poblems?

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mmmm very poor replies on this site so will not be back however for people looking for help on net with same prob go for the cheapest possible fault first, anyone with compression or idle issues etc check this hot start cable common fault. I spent 700 and then found out it should have cost 10 if I was pointed in same direction. For anyone looking for advice or help I hope this helps. All the best and bye

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