Author Topic: quick help needed  (Read 13143 times)

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Offline Freakshow

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Re: quick help needed
« Reply #60 on: October 31, 2008, 09:11:34 pm »
are they the same as the 75 model TM ??
74 Yamaha YZ's - 75 Yamaha YZ's
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Doc

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Re: quick help needed
« Reply #61 on: November 01, 2008, 10:27:49 am »
I don't believe they are the same although they probably would interchange if you really wished and persisted. It wouldn't remain legal to race pre'75 as you've used parts from the pre'78 era ;)

Offline caps 999

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Re: quick help needed
« Reply #62 on: November 01, 2008, 12:59:18 pm »
would a rm125c swing arm be legal  ???
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Offline caps 999

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Re: quick help needed
« Reply #63 on: November 01, 2008, 12:59:55 pm »
is the 125a pre 75 legal
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Offline cyclegod

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Re: quick help needed
« Reply #64 on: November 01, 2008, 01:21:58 pm »
would a rm125c swing arm be legal  ???

NO
Ban BLACK rims NOW

Offline cyclegod

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Re: quick help needed
« Reply #65 on: November 01, 2008, 01:22:35 pm »
is the 125a pre 75 legal

NO its a 1976 model, pre78 only
Ban BLACK rims NOW

Offline caps 999

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Re: quick help needed
« Reply #66 on: November 01, 2008, 01:31:45 pm »
sorry what you said about the swing arm had me a bit confused
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Offline caps 999

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Re: quick help needed
« Reply #67 on: November 11, 2008, 07:58:47 pm »
update ill get pics wen i can evgine has been acid dipped new plastics "nos ones" are hear located 125b front end and located shocks
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Offline caps 999

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Re: quick help needed
« Reply #68 on: November 13, 2008, 07:18:20 pm »
does any one know of any other piston i can use i heard theres a piston i can run but it can only be ran with a race fuel any help would be good
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Offline caps 999

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Re: quick help needed
« Reply #69 on: November 17, 2008, 06:31:13 pm »
do you still have that barrel doc i may be in need of it
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Doc

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Re: quick help needed
« Reply #70 on: November 18, 2008, 12:47:05 am »
caps, I've heard there is a late model RM125 slug that can be used but they're a flat top piston so this maybe the race fuel one?? The only other I've heard of people using in the A is a late model TSR125 (TS125R from the 90's) I was going to play with a T305 or T350 (can't rightly remember which :-\) slug as they 16mm pin but the bore size is something like 60mm or 2mm 'over' maximum wiseco oversize which in reality isn't a lot. 2mm rounder bore in all directions is all but I'm unsure of liner thickness to allow such an overbore. I never looked into this properly as I'm waiting for an actual piston to arrive with some other bits in the not to distant future but 'it maybe' a possibility and quite readily available cheap as chips. If the pin is at the correct angle to the cutaways and the pin height is within striking range then I don't see a problem. As for the barrel, yes it's waiting patiently for a home ;)
« Last Edit: November 18, 2008, 12:50:50 am by Doc »

Offline Freakshow

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Re: quick help needed
« Reply #71 on: November 18, 2008, 12:47:50 pm »
Whats the Wisco number your after, i got a secret stash box of NOS Wisco piston sets and i know i have some Suzuki 250 in there.....................
74 Yamaha YZ's - 75 Yamaha YZ's
74 Yamaha  flattracker's
70  Jawa 2 valve speedway's

For sale -  PRE 75 Yamaha MX stuff, frame, motors and parts also some YAM DT1,2,A and Suzi TS bikes and stuff

Doc

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Re: quick help needed
« Reply #72 on: November 21, 2008, 08:08:49 pm »
Freaky the Wiseco piston kit number for the '76 RM125A is 395 ;)

Offline caps 999

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Re: quick help needed
« Reply #73 on: December 01, 2008, 08:05:18 pm »
got the barrel doc thanks mate its final os but its something the project can continue a little i really need a crank now
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Doc

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Re: quick help needed
« Reply #74 on: December 02, 2008, 12:54:10 pm »
I thought the barrel measured 55mm caps  ??? Would make it 1mm over with another 2 oversizes to go using wiseco. Must have measured wrong :-\ once it gets to 56mm you can run early TM/TS pistons but the lower ring must be removed. The lower locating pin is incorrectly positioned with the TS/TM piston as compared to the RM125 hence you only run the top ring or get the pin repositioned and run both as normal ;)
« Last Edit: December 02, 2008, 12:59:25 pm by Doc »