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Messages - Momus

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Wanted / Re: 1974 cr125honda
« on: August 08, 2018, 11:32:19 PM »
This is the P/N 81/84 CR125 rod that is used as a replacement.

The crankpin is 22 mm versus the 20 mm of the original so some machining is necessary

13200 KA3 740

Spaniards (Bultaco, Ossa, Montesa etc) / Re: Montesa 414 piston
« on: August 08, 2018, 01:36:52 PM »
Easy enough to get them made and rings and pin supplied if you contact Wossner in the US.

Spaniards (Bultaco, Ossa, Montesa etc) / Re: Price guide 54M parts.
« on: August 08, 2018, 01:36:02 PM »
What is it?

Tech Talk / Re: Suzuki ts/tm 250 road racer
« on: August 03, 2018, 10:21:04 PM »
Always TM cylinders on US ebay.

Wanted / Re: Suzuki TS250 Down pipe
« on: July 30, 2018, 09:39:45 PM »
Any TM250 pipe should be a good start.

Honda / Re: Honda xl jetting 34mm mikuni
« on: July 26, 2018, 01:31:43 PM »
ive had a ton of issues over the years with the points on those things, look again at them..

Any up and down movement- wear- of the advance mechanism, or shudder, the cam will make life hard for the points.

Tech Talk / Re: Fitting lower time chain sprocket on crank. XR200
« on: July 20, 2018, 03:59:48 PM »
Yes that is the factory alignment. Cold fit.

Wanted / Re: yamaha dt1
« on: July 12, 2018, 10:41:02 AM »
`Think in the around $500 mark Kenny and not that easy to find .

Look up hydro forming expansion chambers on YouTube if inclined. It might inspire you.

Tech Talk / Re: Alluminium disc rotors, your thoughts?
« on: July 09, 2018, 02:45:31 PM »
Against my better judgement I made an aluminium disc for a 100cc sprint kart about 20 years ago. Was made from the garden variety 5083 H321  plate and electroless nickel plated.  It held up for at least a couple of meetings despite my dire predictions and I had no report of it's failure.

Aluminium has about twice the heat capacity of iron, or stainless steel, so for a given energy input an Al. disc half the weight would absorb the same amount. They must have been running pretty cool though.

Suzuki / Re: 1969/70 TS250 clutch plates
« on: June 24, 2018, 04:18:46 AM »
Thanks Tim

Mine is nearly done a year after what was going to be a tidy on a going bike.

I can get the original 'cork' plates through the local dealer but I'm trying to find some laminated jobs with an aluminium center.

Any ideas?

The countershaft should be harder than the sprocket and probably is OE but who knows aftermarket. The wear is mostly caused by grit IMHO.

Shafts can be repaired fairly easily by annealing, weld building, recutting and case hardening.

Tech Talk / Re: Metal Filler
« on: June 23, 2018, 04:26:57 PM »
Fark welding in that area, especially on a horizontally split case. 

The other way to do this without weld or epoxy is drill a true hole  through the transfer into air then into the area between the seal and bearing and tap fit a brass tube carby spigot style. ;)

You would probably get away with nothing or a small groove in the case and bearing outer beside the crank cheek.

Tech Talk / Re: Metal Filler
« on: June 21, 2018, 07:00:02 PM »
Bog- styrene monomer body filler  works suprisingly well at engine temps.

Suzuki / 1969/70 TS250 clutch plates
« on: June 19, 2018, 08:23:04 PM »
I'm screwing together a Pre70 TS250 and looking for some advice on the clutch friction plates.
These 69/70 use an 18 tab, all 'cork' friction plate versus the later 12 tab type that are usually metal reinforced.

Does anyone know if there is a metal reinforced 18 tab plate available- perhaps from an early TM?

General Discussion / Re: Facebook or Ozvmx Forum?
« on: June 19, 2018, 07:23:51 PM »
Forum is my preferred info gathering area . I too found the bitching got on my nerves a while back and dropped out for quite a time , glad it seems to have died away . I find the knowledge on here is broader with less of the "what bike have I got bro's "type of questions or how can I get my 1977 xyz to go quick what sort of power band should I get ?
Iain .

Yep. It is  an archived resource that people from all over the world access. Face book is useless for all practical purposes after a month or two, and that's on the off chance something was discussed in depth.

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