Search found 197 matches

by Guy53
Wed Mar 18, 2026 10:32 pm
Forum: Twinshock & Classic Trials
Topic: Basket Cases
Replies: 3237
Views: 1775467

Re: Basket Cases

what do size is the front sprocket?
Guy
by Guy53
Mon Nov 10, 2025 1:00 am
Forum: Twinshock & Classic Trials
Topic: Yamaha 74 TY250a gearbox oil capacity/oil brand advice
Replies: 3
Views: 2431

Re: Yamaha 74 TY250a gearbox oil capacity/oil brand advice

I use ATF ( Ford ) in mine. When I change the oil, I drain and let the bike on a stand overnight than fill with fresh ATF run for a couple of hours than repeat The oil change. Maybe it's overkill but I had good result.
Guy
by Guy53
Mon Oct 03, 2022 10:17 pm
Forum: Twinshock & Classic Trials
Topic: Basket Cases
Replies: 3237
Views: 1775467

Re: Basket Cases

The '' nicer '' is a bike to ride the more you want to ride it. Good job David.

Guy
by Guy53
Wed Aug 17, 2022 9:22 pm
Forum: Twinshock & Classic Trials
Topic: TY B ( 493 ) crankshaft
Replies: 11
Views: 15721

Re: TY B ( 493 ) crankshaft

The final decision was made by the '' commity of rebuld '': the crank was sent to a specialise shop to be rebuld. they will check if the job is doable and if so, they will overall it. It's not cheap, but they are very reliable place.
by Guy53
Fri Aug 12, 2022 9:31 pm
Forum: Twinshock & Classic Trials
Topic: TY B ( 493 ) crankshaft
Replies: 11
Views: 15721

Re: TY B ( 493 ) crankshaft

JC1 as the DT piston did not have the bottom of the skirt '' besseld '' as the TY ones, you certainly are right about the early DT but I was thinking about a late ( 1979 here in Canada ) one. Since the crank in question is about 500 miles from our place and not being sure that the seller will give ...
by Guy53
Sat Aug 06, 2022 10:05 pm
Forum: Twinshock & Classic Trials
Topic: TY B ( 493 ) crankshaft
Replies: 11
Views: 15721

Re: TY B ( 493 ) crankshaft

I have a couple of A model crankshaft here so we will have a look at the drive side half to see if it is still usable. The bike aparently was droped in a streem and left to rested for a long time, it took a lot of persuation to finaly '' unseize '' and take it appart.
Thank you for the offer to sell ...
by Guy53
Fri Aug 05, 2022 9:34 pm
Forum: Twinshock & Classic Trials
Topic: TY B ( 493 ) crankshaft
Replies: 11
Views: 15721

Re: TY B ( 493 ) crankshaft

David, the DT 400 B is listed with a 70mm stroke, if I want to replace the crank in a TY 250 B and keep it standard, what choise do I have ?
We have looked all over the place to find a replcement for that crank, but can't find anyting.
Guy
by Guy53
Fri Aug 05, 2022 9:21 am
Forum: Twinshock & Classic Trials
Topic: TY B ( 493 ) crankshaft
Replies: 11
Views: 15721

TY B ( 493 ) crankshaft

Does anybody kbows if a DT crankshaft fit a TY 250 model 493 B model here in Canada

Guy
by Guy53
Sun Feb 27, 2022 11:50 pm
Forum: Twinshock & Classic Trials
Topic: Basket Cases
Replies: 3237
Views: 1775467

Re: Basket Cases

Super nice
Guy
by Guy53
Fri Feb 25, 2022 11:27 pm
Forum: Twinshock & Classic Trials
Topic: Basket Cases
Replies: 3237
Views: 1775467

Re: Basket Cases

Are yu sure about the MT43 as they don't have '' square '' center knob
Guy