Shot from pipe when i try to start

maciej_mi · Post by **maciej_mi** » 09 May 2013, 20:04

It's sometimes happening on cold engine. Why? Carb is set aright. Crm is powerfull, works on all rpm's nice. But earlier when my crm shots, badge the piston rings and piston ending (no dimension). I don't ride a lot. How many km's should make it wossner piston in crm 250 mk3?

Post by **fallenmikethebike** » 09 May 2013, 21:16

All other factors being correct, A wossner piston should give at least 10,000K of reliable usage.
Mike

Post by **pudzie83** » 10 May 2013, 09:03

sounds like a bit more fuel could be needed check your plug for colour if running exactly right it should be a nice brown colour

white/dry=to lean
brown=perfect
black/wet=to rich

could be a plug on way out if everything else is normal

maciej_mi · Post by **maciej_mi** » 30 Jul 2013, 20:48

It's brown, when i tank a little bit of mixture directly to the barrel across plug hole, she start first kick ever without shots.

Maybe reeds?

Post by **pudzie83** » 31 Jul 2013, 16:05

worth replacing if there old. any gap between the reeds and block is a sign of wear

maciej_mi · Post by **maciej_mi** » 01 Aug 2013, 17:31

I will buy new. What is best jetting for mk3 with full dep exhaust and boyesen reeds?

Post by **knackeredMk1** » 01 Aug 2013, 17:45

Oh dear..................

Post by **fallenmikethebike** » 01 Aug 2013, 19:14

not oh fcuk

Mike

Post by **fishtail** » 03 Aug 2013, 11:51

strangely enough this has started happenin to me the last 2 times I rode.. actually today I dint get out the car park..

las tues - decided to raise needle - and then startin it was a total be-itch! start - rough chuggy run.. cut out - BACK FIRE!

i took slide out againn and put it back it and went - and actually pulls like a mutha tucker now

AR behind me was eating my roost again!

today tried to start - and same buggery trickery with back fires etc.. checked plug - looks like I am runnin well rich actually.. ( black plug! )

thought swop my pilot.. it was a 42 ( i only had a 38 not a 40 - thought I'd give it a go,, )

I was swoppin jets the lazy way - ie spin carb in the manifold / no need to wrench it out...

blinkin pin for the float pivot falls out,,... this benefits me - cos I have to fish out - take off sprocket guard - goog golly! one sprocket bolt is now finger tight! and hanging on by a prayer! also notice one engine mount bolt is loose as well

------> anyways I am thinkin the problem I was havin which may be the OP's problem? ----> is my pivot pin is loose - and this is jammin the float some how? ( las week I rotated carb to remove throttle an raise needle - caused the float to stick? no float action - no fuel - so then cutty out!

my next action is to remove carb from bike - give it a clean.. anyway to stop that pivot pin from sliding out so easy? or no worry abou tit?

Post by **fishtail** » 03 Aug 2013, 11:52

stock jetting for Mark 3 is on here

http://www.crm250.com/specs.asp

not supposed to require jet changes for that exhaust I think?

Post by **fishtail** » 05 Aug 2013, 13:59

u did swop the plugs? cos I changed mine and alls good again!

maciej_mi · Post by **maciej_mi** » 07 Aug 2013, 11:44

I check few new plugs, always same problem.

Shot from pipe when i try to start

Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start

Re: Shot from pipe when i try to start