feetupfun

I ride 1970s off-road bikes. I bought a Tubliss for using with tubeless rear trials tyres on tube type rims on trials bikes but when I weighed the Tubliss and found it was heavier than a tube, I continued with my normal method of trimming the beads on the tubeless tyres to fit the tube type rims. The $160 Tubliss is still sitting on my shelf Your Rev3 should have a tubeless type rear rim and if the rim sealing band is still sealing, it will work fine with a tubeless trials tyre without a tube or a Tubliss. Some people have problems with the sealing band not sealing against the rim and end up using a tube to avoid air loss. Once a tubeless tyre is seated on a tubeless type rim, it usually stays put but there was a problem a few years ago with IRC rears in this regard.

I bought the right size perforated steel tube for my 348 in the form of a go-kart muffler core and it was very economical. I didn't need to curve it though

It's a non-standard hole made for the ignition cables to protect them a lot better than the standard hole which is underneath. If the cables come out the hole underneath, they tend to get squashed between the bashplate and the engine casings

Handling will be lighter with the WES and the sound is a bonus. Same for the TYoffroad TY175 exhaust. Lots lighter and sounds great

Now I'm really confused ?. I was thinking that Kiwis call them Jandals, a shortened version of Japanese sandals

Yes the 213 is a wonderful thing but does take a serious kick to start. I wouldn't be game to try in jangles which I suspect are the same thing as flipflops/jandals/thongs

The first models of Alpina (85 and 99) have a fairly short seat but the models after them are fine for two-up riding for two people depending on how big their bottoms are. No Alpina is what you would call powerful but the 325cc and 350cc models have enough suitable pulling power for two-up riding. I don't know what "shes quite up for a scooter" means

Normal thing to do. Can use most any automotive points ignition condenser. The important thing is to get a reasonably fresh one. If you go for a new condenser made in 1975 it may not be any better than what you are replacing. I usually look for one with a long tail and a nice mounting lug to make it easy to fit and connect up. I've had success with Bosch products made for old Mercedes cars

I have an array of 1970s twinshock trials bikes because except for two, they are the bikes I wanted when I was a teenager but couldn't afford. The exceptions are the TY175B which I did own at the time and a 250 Godden Majesty which is a bike I didn't even know existed until about 1995.

Larry I'm going to have a go at re-writing what I think you have written to see if I have understood your posting. "I can't find a Rickman forum. I've got Rickman Montesa and Rickman Hodaka project bikes. I bought the Rickman Hodaka frame from a wrecker in Michigan. Most small Rickmans are for Zundapp engines. The frame has a H stamp. I found parts to complete it on ebay. The 100cc motor runs and shifts. The forks and wheels are from super rat 125. Either the motor or the frame is 6/71 which was on a small tag on the left side. The whole project has cost $US1500 so far. The motor is either stock with some Super rat parts or I might try and use some super rat parts or I might look for a better performing Hodaka engine. The gearing on it is very high. The Montesa did run but a few hours after I bought it, I found it had a broken gearbox shaft which needed the cases split and parts to fix it. The motor is the same as what came in a 1973 250 Cappra VR. It was stored in a barn in East Washington State for 20 to 30 years, was ridden by two brothers then a son. It was delivered to me. I could not believe how high the compression or the power was for an old engine. I am sure it has a pickled cylinder. It has rust in the tank and wheels. It's been pulled apart and stored in boxes. I have bought parts to fix it from a dealer in Oregon for when I can get to it. I've rebuilt some Bultaco motors. These Rickmans are not for sale. I like seeing photos of Rickmans but there are not many photos on the trials forum. I lost my Rickman photos when my other PC died. There are pictures of me at "Happy Hodaka Day"."

Not related to the liquid compatibility as such, but there is an issue with modern pump petrol forming a very strong and adherent gum when it dries out.

If it's just the brake action you want to improve, why do you also need to swap the shifting over? Lots of people ride trials with shift and foot brake on the same side

Montesa dirt bike. Similar to Cota 348/349 but your hub is bigger and stronger. Cota 348/349 is 118mm sprocket ID. I had a Montesa Cappra 125 rear hub that looked like that and it was bigger than the Cota 348 hub.

To get a bit of movement started you could heat the outside of the fork tube at the position where the damper rod piston is stuck while gently tapping opposing ends of the damper rod in turn

Front braking while turning downhill is helpful for balance and speed control. Front braking technique is important when you are going downhill and turning from across the hill to downhill because weight is becoming transferred to the front. Rear braking is important for controlling the bike in turns that require some engine power.

Another thing that can help with this sort of work is to modify the ID or OD of the old main bearings enough so that after fitting the new conrod, you can do any test-fitting of the crankshaft with ease at room temperature

DickyM it's the centreing of the conrod in the bore that is important rather than equalising the side clearances on the crankwheels. You may not need a shim to achieve this.

Because there is more torque on the clutch in the higher gears

You got me wondering if I was imagining USD forks on my friend's bike so I went looking for photos. Here are a couple of photos of my friend's 2001 Rev 3 270 showing the USD forks that it came with (the bike that you have been told none were brought into Australia). Photos taken in 2004 or 2005 when the Queensland Trials Titles were held near Dayboro. From memory the first owner was Kris Hammond. Second owner (shown in photo) was Ken Cutmore.

A friend of mine had your model Rev 3 with USD forks and it developed more sag than normal and he discovered that the fork spring was broken. If yours is a 270 it might even be the same bike. My memory is telling me that those forks were standard on the first model Rev 3 and were optional on the second model Rev 3. Yours looks like the second model which I would call the 2001 model. This is what the first model Rev 3 looks like

I don't think it will have an oil filter. If it's like the Jotagas bikes I've seen they are two strokes. Normally only 4 strokes have oil filters.

Wow that's amazingly original after all the years. Good find and great to see. Thanks for the photo. The absence of external damage and wear makes me think it must have been parked up somewhere for almost its entire life so far. The tyres look like 1970s type. I bought a TY250 in this sort of condition in 1994 and was amazed at how unused and undamaged it was at the time but that was 26 years ago so yours is even more surprising.

The A model fits yours and the BCDE covers are all the same. Either cover suits either flywheel on any engine. They changed the cover design to make the motor look slimmer after initial criticism of the width of the A model engine and also to help keep the bike at the same weight despite the heavier flywheel. The BCDE cover is magnesium while the A cover is aluminium. Other weight saving changes to keep the weight the same with the later, heavier flywheel were aluminium brake arms, magnesium clutch cover and oil pump cover and an aluminium fuel tank. If you do get an A model magneto cover, a BCDE model shift lever will probably not suit the shape of the A model cover.

and another one https://www.ebay.com.au/itm/1974-YAMAHA-TY250-TY-250-Stator-Cover-Mag-Cover/362581712843?epid=1681129835&hash=item546b8ddfcb:g:2DoAAOSw~Tdch9zo

and another one https://www.ebay.com.au/itm/1974-YAMAHA-TY250-TY-250-Stator-Cover-Mag-Cover/362581714795?epid=1681129835&hash=item546b8de76b:g:618AAOSwrERch93A