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Author Topic: RM 125  (Read 3085 times)

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Offline RM Ted

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RM 125
« on: November 02, 2009, 06:02:30 pm »
78 RM 125, STARTS AND RUNS BUT AS SOON AS YOU PUT IT IN GEAR AND RELEASE THE CLUTCH IT DIES IN THE ARSE ?????? CLUTCH BASKET DOSE HAVE A ONE BRICKEN FIN. ANY IDEAS ????
« Last Edit: November 02, 2009, 10:14:23 pm by CLARKEY »
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1978 rm 125 x 3
1981 rm 125
1987 rm 125

Offline lukeb1961

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Re: RM 125
« Reply #1 on: November 02, 2009, 06:30:51 pm »
3 suspects leap to mind.
main seals, float-bowl wildly wrong (flooding), crap coils (spark dies under the slightest load).

more clues on behaviours, sounds, tests done so far, please!

Luke
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mainline

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Re: RM 125
« Reply #2 on: November 02, 2009, 07:49:01 pm »
horribly oversized pilot jet?
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Offline oldyzman

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Re: RM 125
« Reply #3 on: November 02, 2009, 09:26:36 pm »
I have a similar issue with a RM125a, look forward to seeing more clues...
YZMAN
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I have a soft spot japanese mxers with aluminium tanks. Two stroke classic Dirt Track...

Offline Husabergpete

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Re: RM 125
« Reply #4 on: November 02, 2009, 09:41:08 pm »
Clarkey,

            We finished our RM 125 C and it's been running extra fine. If you want the jet sizes etc. let me know.

Pete @ Corrimal
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KTM 250 1980,  Maico 250 AW 1977, Husqvarna CR 430 1981, , CZ 250 1973 and a 550 Husaberg

Offline Lozza

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Re: RM 125
« Reply #5 on: November 02, 2009, 09:53:20 pm »
Look at the plug they know the answer.
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Offline RM Ted

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Re: RM 125
« Reply #6 on: November 02, 2009, 09:58:13 pm »
OK, CYLINDER HAS HAD A PORT AND POLISH ( 20 YEARS AGO) AND POWER REEDS FITTED, STANDERD JET (240) AND PILOT, NEW COIL. THE ROD DID HAVE SOME MOVEMENT FROM SIDE TO SIDE WHEN I DID THE TOP END, NORMAL ?? I HAVE ALSO FITTED A FEW OTHER CARBS BUT THEIR IS NO DIFFERENCE. NOT SURE ABOUT FLOODING AS THE BIKE REVS FINE WHILE IDLE ??? I HAVE NOT TRIED A BIGGER MAIN JET YET, WILL GET ONE TOMORROW. PLUG LOOKS GOOD ??
« Last Edit: November 02, 2009, 10:17:36 pm by CLARKEY »
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1978 rm 125 x 3
1981 rm 125
1987 rm 125

Offline oldyzman

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Re: RM 125
« Reply #7 on: November 03, 2009, 09:19:23 pm »
Maybe main seals as previously mentioned, good luck gettin of the magneto! mine is stuck on. I made a puller, tried a heat gun bit of a tap. stuck!!! ANy suggestions
Cheers Brett
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I have a soft spot japanese mxers with aluminium tanks. Two stroke classic Dirt Track...

Offline crs-and-rms

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Re: RM 125
« Reply #8 on: November 03, 2009, 09:34:34 pm »
have you looked at the gear box dose it select all the gears and still rotate when engine not running .try running it with the rear wheel of the ground and see if it  still stalls
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Offline RM Ted

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Re: RM 125
« Reply #9 on: November 03, 2009, 10:01:20 pm »
COULD BE THE SEALS ?? I HAVE A SPARE BOX OR TWO WILL FIT AND SEE ?? I WILL TRY A BIGGER JET FIRST AND MAYBE FUEL TAP. MAY JUST NEED MORE FUEL ?? OR MAYBE JUST PUSH DOWN THE BACK OF THE SHED AND RIDE ANOTHER ONE !!!!!!!
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1978 rm 125 x 3
1981 rm 125
1987 rm 125
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