What did you do to your 2T today?

85RZwade · January 21, 2020, 06:53:23 AM

Bought it a front master cylinder on eBay from Germany, 11mm Aprilia RS125 piece. It will need a lever and undoubtedly a rebuild, but it should be the right diameter to give a satisfying braking experience when combined with the Brembo caliper above.
Wade

Greaser Greg · February 15, 2020, 09:56:13 PM

Pushed it three miles after it locked up. Not too many hills around here

85RZwade · February 15, 2020, 10:57:33 PM

Oh, no! Sorry to hear, man.

Greaser Greg · February 16, 2020, 12:48:07 AM

I appreciate the sympathy. Got offered a few rides, and wasn't far from a friends house, but figured the exercise wasn't gonna kill me.

Barrie · February 16, 2020, 02:12:36 AM

Any idea why it nipped up?

Greaser Greg · February 16, 2020, 10:46:06 AM

Not sure why this happened, but it did.

Czakky · February 16, 2020, 11:13:02 AM

Looks to be oil on the pistons... Was this the shakedown run?

Greaser Greg · February 16, 2020, 11:19:41 AM

No, I've ridden it a few hours. The timing was wrong at .2 btdc for an hour of running on the table before I figured it out.

Czakky · February 16, 2020, 11:22:17 AM

What's it running with? Ignition? Exhaust? Jets? Carbs? Oil pump/premix? Fuel filter?

Barrie · February 16, 2020, 11:54:39 AM

Check to make sure the pump is giving an output.
Has it just nipped on one side?

pdxjim · February 16, 2020, 01:28:41 PM

Whatever it was, looks like you got off easy.

No piston destruction means crank and bottom end are likely ok.

Greaser Greg · February 16, 2020, 10:02:40 PM

I haven't checked the pump yet, but one of the Pistons was a little tight in the cylinder as I swapped in an matching art piston to replace one from hvc after it had been bored, with just a hone to get it within spec. Forget which side it was, but have a good guess!
Yeah, dodged a bullet for sure with the intact piston. Just a little aluminum stuck to the cylinder walls, and some shiny stripes, so am thinking just try and clean it up at same size.

Anybody think that piston is salvageable? The rings def got some wear on them but not terrible. Is it just plain stupid to try and use them? Dykes style rings, if I can find any, are ridiculously priced on eBay, around $100! I think I paid $27 each for two sets last year.

Barrie · February 16, 2020, 10:39:52 PM

If there is oil then the piston did not have enough clearance(not run in enough), as for cleaning up the piston, give it a go, it will only be noisy .
Did you use mineral or synthetic two stroke after the rebuild?

SUPERTUNE · February 16, 2020, 11:49:14 PM

Quote from: Barrie on February 16, 2020, 10:39:52 PM
If there is oil then the piston did not have enough clearance(not run in enough), as for cleaning up the piston, give it a go, it will only be noisy .
Did you use mineral or synthetic two stroke after the rebuild?

Oh come on...very stupid statement.
That piston is way gone. Maybe to repurpose for a trophy.
Chuck.

85RZwade · February 17, 2020, 08:57:51 AM

I would toss that piston also. Muriatic acid is cheap and will dissolve aluminum smeared on a cylinder wall; you might be able to avoid boring.

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What did you do to your 2T today?