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Author Topic: pre '70 rti  (Read 3568 times)

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Offline pancho

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pre '70 rti
« on: November 25, 2008, 11:38:31 am »
my rti siezed half way through the 25 lapper at the nepean two day meet.the problems per list 1/.i now have 2 barrels and pistons that are rat-s!!!, and max oversize. 2/.the only financial supply is the o.a.p. [plus occasional lurky cash jobs].QUESTION, does any one know of a piston that is a bit bigger out of anything else that i could have my barrell bored out to take?the class is pre'70 500cc so big bore can only help make up for ability! cheers wally.
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Offline vandy010

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Re: pre '70 rti
« Reply #1 on: November 25, 2008, 12:09:49 pm »
PM sent Wally
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Offline Freakshow

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Re: pre '70 rti
« Reply #2 on: November 25, 2008, 12:27:05 pm »
Wiseco go out to 8th over or 2mm
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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

Offline pancho

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Re: pre '70 rti
« Reply #3 on: November 25, 2008, 04:07:24 pm »
thanks for the response mick and freaky it looks like some possibillities, great!thanks again!   wally.
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Offline Noel

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Re: pre '70 rti
« Reply #4 on: November 25, 2008, 08:31:18 pm »
Hi Wally,
Talk to Nev.
I mentioned your problem to him the other day and he said he had a source.
Cheers
Noel
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Offline nifty

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Re: pre '70 rti
« Reply #5 on: November 25, 2008, 08:42:28 pm »
Wally,
Give me a call on 0418693663, what size are your barrells on now? Just had a crank re built by Craige down at MMT, couldn't for the life of me find an RT1 rod kit but we have now found one to match through PROX - gotta keep them RT1's goin!

Nifty
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Offline Freakshow

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Re: pre '70 rti
« Reply #6 on: November 25, 2008, 08:51:28 pm »
Actually what size piston are you after Wal ? i got a box of Wisco 250 -360 NOS here, is it reed or non reed ?

Nifty post the prox number so its online here for a resource  :)
« Last Edit: November 25, 2008, 08:54:52 pm by Freakshow »
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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

Offline nifty

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Re: pre '70 rti
« Reply #7 on: November 25, 2008, 09:03:01 pm »
Now you made me goin dig everything out of the pile - here it is : PROX 032304, make sure you you get the little end bearing to match.

Nifty
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Offline Nathan S

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Re: pre '70 rti
« Reply #8 on: November 25, 2008, 09:40:18 pm »
Quote from: Freakshow on November 25, 2008, 08:51:28 pm
..., is it reed or non reed ?



If its running as a pre-70 bike, then its non-reed.

I bought a stack of Yamaha pistons from jgroom888 on US Ebay, and paid SFA for them - but they only go to +1.00mm, and I keep forgetting to look for the larger (after-market) piston kits.
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Offline vandy010

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Re: pre '70 rti
« Reply #9 on: November 26, 2008, 01:21:12 am »
http://ozvmx.com/community/index.php?topic=586.0

here's a link where the pro~x rod kit was mentioned too.
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Offline jimg1au

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Re: pre '70 rti
« Reply #10 on: November 26, 2008, 10:31:38 am »
i have 4 after market pistons for piston port rt1 yamahas after wally gets what he wants i will offer the rest for sale here
cheers
jim
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Offline Freakshow

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Re: pre '70 rti
« Reply #11 on: November 26, 2008, 10:45:26 am »
good point nat, i missed the pre 70 bit  :O)
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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

Offline Nathan S

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Re: pre '70 rti
« Reply #12 on: November 26, 2008, 12:57:05 pm »
Quote from: jimg1au on November 26, 2008, 10:31:38 am
i have 4 after market pistons for piston port rt1 yamahas after wally gets what he wants i will offer the rest for sale here
cheers
jim

OI!
 ;)
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Offline vandy010

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Re: pre '70 rti
« Reply #13 on: November 26, 2008, 05:29:45 pm »
ok Jim, you got my interest too. piston curious Vandy.
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