trialsrfun

The earliest Greeves banana forks had the brake torque arm pivot point in front of the leg tube, this was quickly changed to the rear of the tube to give a much stronger mounting point, pulling the mounting tube onto the leg of the forks not tearing it away which is possible with the early type fixing.

Replace the O ring around the base of the main jet housing in the carb float bowl, this ring if not sealing properly causes all sorts of running issues on the TY175 Yamaha. Remove the float bowl you will see it straight away.

Nice bike that. It is a Royal Enfield Bullet either 350 or 500cc from the early 1960's, the air cleaner is missing but not a problem other than that it looks to be ready to give a go in some classic trials.

Thank you Woody

Can anyone please tell me the correct amount of oil per leg needed for the OSSA TR77 which has the long leg Betor forks. Presumably these are similar forks to those fitted to the OSSA MAR mk3? Likewise the gearbox/clutch, amount & type.

I probably view it as one man's quest to build his perfect bike but entirely share the view held by Greeves regarding modifications to existing twinshock bikes.

Also had the opportunity to try some Bultacos at the trial, the orange Motak Sherpa and a couple of Spanish Sherpas. Thoughts are on the Bultaco forum. Could you please send a link to the above Woody, I cannot find anything.

I now have the frame back from the powder coaters (the quoted 'done in 3 day's' was done in 2 weeks) swing arm fitted, brake pedal/chain tensioner on then the day job took all my time & energies so engine ready and waiting to come next.

Thank you Nigel, Am on a bit of a learning curve with the OSSA so all helpful build advice is welcome.

On the OSSA MAR / TR77 brake pedal cross shaft where the chain tensioner pivots a pin is required, should this be a roll pin or something else maybe with a head to secure the chain tensioner spring? Can the rear brake pedal be installed and removed with the engine in the frame. Never having previously owned an OSSA and starting with a basically good but partially dismantled bike the reassembly raises a few questions so any assembly hints and tips you have will be welcome. Thank you all.

Pleased to learn you have found a bike. I have a Rev 3 250 my friend an Evo Beta are a good bike, enjoy riding it. if you are still interested in a Triumph Cub message me I know of one for sale locally.

The IH are a bit of a personal favourite, 4 cylinder, 4 gears in 2 ranges. disc brakes, a good tractor. Let us know how it goes with the Cub please.

Go get the Cub and give it a go why not. What tractors do you have it is another interest of mine too.

Yes I see what he is saying but either bike has a bit of age about it and both will need setting up properly. That is no mystery just a good (preferably electronic) spark and unworn carb, not too high geared and brakes that do work. Is the bike in current use in trials, could you go to a meeting and have a ride on it, also ask someone else to try the bike they will have more experience than you. The same would apply to the Yam as well.

If you are riding in classic events then the Cub is a fine bike, obviously it does also depend on how well it is set up but that is something you will soon learn about from other riders. What area are you from and which events are you planning to ride in?

The rear hub is the same as on my Model 124 250cc 1974 & will be correct for your bike. The alloy sump guard conversion has been really well carried out, the whale tail especially is as on my 199A 1980 350. Check the brake drum surfaces they were chromed when new this does come off but can be repaired with a cast iron lining with the rim in place. Alloy guards do really suit the Bultaco bikes but are a little bit pricey if you are riding it.

Thank you Woody I was thinking something along those lines myself so no easy fix. I think it will have be dismantled occasionally to grease as normal. The small hole you mention in the spindle is to allow a bar to go through the hole on the cross tube into the spindle to prevent it rotating when being dismantled.

Has anyone added a grease nipple to the swing arm pivot on a MAR, if so how was it achieved.

Well done Stu you are bringing her up properly.

I spent a bit of time looking at that Cub it was certainly not very standard particularly when compared to the James standing near to it. There is no oil tank or oil in frame so presumably the gearbox oil gets pumped around. The rear of the side cases have been shortened and squared off behind the kickstart lever for some reason. The frame appeared to be very altered from Triumph spec too. The James standing behind it which I believe was ridden by Roger Williamson is so standard with the 197 type frame and early James forks. Clearly the most important component is the rider as always.

Nice job that I like it. But what is the twin leading shoe front brake off?

Thank you for the Bantam picture, I thought it a great bike.

Did anyone get a photo of the Bantam trials bike which was shown on Saturday? It had a large diameter frame top tube with the engine suspended from it attached by the cylinder head. There was just so much of interest, it is only now a few days later that you remember some of the things on display.

Did anyone else notice the three cylinder two stroke engine that Simon Bateman, Nametab Engineering is building. Imagine a parallel twin with an extra cylinder sticking out horizontally in front, each cylinder is one of the Greeves square barrels that he replicates with I believe a Royal Enfield gearbox fitted.

Never say never GG. I was amazed at the number and variety of bikes as well as the other items you had on display, your stand was certainly a major highlight of the show. It was also a pleasure meeting you and discussing the Mecatecno & Merlin bikes, thank you.