Author Topic: RM125 what are these parts?!!!!  (Read 1565 times)

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Offline John Orchard

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RM125 what are these parts?!!!!
« on: August 01, 2012, 03:34:34 pm »
Hey Guy's, I have come across a couple of head & barrels to suit RM125, either A,B or C  BUT the strange thing I find is, firstly the barrel has a T shped exhaust port (where the stock A,B,C is square) and an 'un bridged' intake port, unlike all other RM125 A, B orC's I have ever seen.

Secondly, the cylinder heads have a factory squish-band !!!!

What could these be off?!!

I'll get a couple of pics soon.
Johnny O - Tahition_Red factory rider.

Offline jerry

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Re: RM125 what are these parts?!!!!
« Reply #1 on: August 01, 2012, 03:38:53 pm »
Gaston Rahiers RA125? J

TM BILL

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Re: RM125 what are these parts?!!!!
« Reply #2 on: August 01, 2012, 04:03:41 pm »
Sounds like a stock RM 125A set up  ;) T shape exhaust port , unbridged intake port 56mm std bore and different sqish in the head to B and C models  :)

TM BILL

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Re: RM125 what are these parts?!!!!
« Reply #3 on: August 01, 2012, 04:07:48 pm »
Does it have provision for the case reed ? if not it could be RM 125S or RA 125 ;)

Offline John Orchard

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Re: RM125 what are these parts?!!!!
« Reply #4 on: August 01, 2012, 04:47:13 pm »
Come on Bill, I know my ABC's ;-)  Yes, case reed/piston port!
Johnny O - Tahition_Red factory rider.

Offline John Orchard

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Re: RM125 what are these parts?!!!!
« Reply #5 on: August 01, 2012, 04:50:02 pm »
The cylinder's are 56mm, they could be standard bore A models.  I always thought A barrels had a bridged inlet, ok I guess that explains the barrels but I know A heads do not have a squishband.
Johnny O - Tahition_Red factory rider.

TM BILL

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Re: RM125 what are these parts?!!!!
« Reply #6 on: August 01, 2012, 05:53:58 pm »
The cylinder's are 56mm, they could be standard bore A models.  I always thought A barrels had a bridged inlet, ok I guess that explains the barrels but I know A heads do not have a squishband.

The 4 RM 125A heads i have sitting on the shelf with Squish bands must be specials then  ;)

Offline John Orchard

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Re: RM125 what are these parts?!!!!
« Reply #7 on: August 01, 2012, 05:58:48 pm »
Oh ok then, hmmm, of all the pics of 125A heads on ebay, none have them have squishbands, they must be B or C heads.

You wanna sell a 125A head? I want to try a squishband on my B.
Johnny O - Tahition_Red factory rider.

Offline John Orchard

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Re: RM125 what are these parts?!!!!
« Reply #8 on: August 01, 2012, 06:00:32 pm »


Johnny O - Tahition_Red factory rider.

TM BILL

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Re: RM125 what are these parts?!!!!
« Reply #9 on: August 01, 2012, 06:04:27 pm »


B head on LHS  A head on RHS   Would sell a head but might look odd as finning area is much smaller .

RM 125A Cylinder









RM 125 DG head



« Last Edit: August 01, 2012, 06:18:28 pm by TM bill »

Offline John Orchard

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Re: RM125 what are these parts?!!!!
« Reply #10 on: August 01, 2012, 06:42:10 pm »
Ahhhh thankyou Sir, that eplains my error  ;-)

I'd be cool to try an A head, if it works I'd blend the barrel fins to make it look ok.
Johnny O - Tahition_Red factory rider.