i just receved yesterday the entry form for this year Vintage Fest at Ormstown Qc , and for the 3rd year Mick will be there. I look foward to meet him again, as you all said great MAN. He does'nt only advise you on riding technic, he generously give you pointers on '' setuping '' your bike. If you never attend Mick trial scool, you miss something.
I use to ride a TY A with the flywhell lightened, now I ride a B model with the same flywheel. I could'nt bring myself to put the super heavy B model one. Might be the right thing in mud mud mud !!!
As far as the MAR, I only tried one and it was not setup for me so I did'nt like it but the owner was cleaning it sections with 2 finger in the nose I would '' 5 ''.
Jon, the extra ground clearence make a lot of difference.
Here in Canada they where equiped with a starter ( from 1974 on I think ) and where heavy with a flat power band. I don't know anybody that modified one to improve it. Also agreed with twinshocktosser for there quality.
If you plan to make the mod David did on the Peter Pace replica, think twice about the next trial you want to attend with that bike. I have acces to a machine shop and I worked in maintenance for a long time, I can tell you that it took me a lot more time than I thougt it would, and the final assembly is often not the final assembly as you have to custom fit everything. So I realy tip my hat to you David, planning and realising that bike with nothing but old photo to refer to, I don't know how you did it.
I have a set ot Betor trial expert and a set of NJB ( both 340mm, 40 pound spring ) on standatd and modified TY and I like the NJB trial Expert, I should tell you that I'm an average rider, so maybe I cannot tell the difference.
Hi Thats_a_five, if you look at the other picture you will see Mono and IT piston, machining a new sleeve with the exact porting is a lot of work since I only found one second OS for std 250 mono.
Fantnik : Thank's I will check Wiseco although I'm not there biggest fan and also give Mitaka a look
Tony : Yes the piston pin is set close to 2 mm lower on the Mono ( probably because of the 68 mm stroke vs the IT YZ TY ts stroke is 64mm ) and the skirt of the piston is also longer on the Mono. So if someone have done the mod they had to mofify the cylinder base and the also machine the head .
2stroke4stroke : Yes I'm looking for a barrel or a complete bike for parts, but here in Québec ( Canada ) they are few, and I looked all over the net to find a piston ring set.
Hopefully I will find the parts or the correct modification to do because as you can understand I can't make mistake.
The bad news came this morning, I need a 3rd OS piston ( and ring ) for my 250 Mono. I didn't find one and I am told an IT ( or YZ ) or a TS piston would fit with modif made to the cylinder and head. Quite a few post are scratching the subject, but if someone as done the job with good result I would apreciate the details. Of course my first choise would be a 3rd os TY but ... I also will change the rod , but replacement is avalable. There are 2 different type of IT piston, the one with the '' arche '' is suppose to be beter but wear faster. I don't realy use the last bit of power of the bike since I am an average rider. So TS or IT and if IT, withc one choose?
Thank's, I'll pass those info to a friend who is looking for a way to change the handlebar mount or to move it back on is KT he is considering using RoxRiser to do the job , I don't know if it's a goo idea.
I'm not a specialist, but every time I can, I have a test ride on any trial bike, and my TY B and I have in mind a couple of A and D just work fine, not at par with a good SWM 350 but beter than any 250 that as not been cared for.
Good clean well tune carb, CLEAN exhaust ( very important ) replace the head gasket by a thinner one ( .005 to .010 ) good piston and a sprocket combination that suit your riding style. Voila... a respectable TS. Yes you have to set up the suspension! As Andy wrote I took the flywhell weight off on my B but this winter I will put it back on ( maybe a little lighter than the one on 434 model ). But Dixie your not the first one with that impression, if you dig a bit you will find more than one thread asking your question and getiing more advise than I write in this reply.
Does it pull from idle and than get's rough or is it rich right from idle, also check if the carb is clean, I bought the same carb and had the same problem to find a piece of plastic providing the choke to close correctly.
Big weekend of fun comming up, 4 days with Mick Andrews ( I hope the wheater will cooperate ) first thing I'll check when I come back is the size of the VM, I had both carb 5 feet apart this saterday and did'nt think of that.
I bought a 44 H TY mono a few weeks back, fixed the igniton and put it in the shed while I finish a TS project, this weeckend I made a few round behind the house to find it very VERY " SLUGGISH " so I took the carb off cleaned it put it back with no improvements. I'm sure the exhaust need's a good cleane up but still I think the carb need's fixing. I have " on the shelve " a new roung slide 26 mm Mikuni ( VM type ), is it a good idea to try it on ? Or am I loosing my time, I know I have to modify the flywheel. but I have to start somewhere.
Ty80 Help Needed
in Yamaha
Posted
Is it running with the choke on ?
Guy