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No, the Tank was not touching the air Filter. But the bike now has 172.000 km on the clock, most of them travelling with a big Harro Elefantenboy Tank bag. Perhaps that is the reason for the Cracks. But I know two colragues that have this crack at the same place. Anyhow I can Highlights recomend thi...

During more than 10 years I was fighting with some fine crakcs underneath the tank of Roci. I´ve tried epoxi, uhu plus 300 and even soldering two times. The problem always came up again ... Until I found this incredible glue. Resistant to gasoline, oil, salted water ..., to be used although under wa...

I think, the most important thing in that situacion is not to break on the front wheel! Guess that was, what I tried with that GT250 and ended up on the ground inmediately. Being that surprised I supose that my intuicion said: Stop Now that we know that this horrible situacion might be easier to han...

In 2011 I tried to resume the main diferences between the 500/501 and 350 motors in the german forum. In the 4th post you find the results . I don´t have the time to transduce all that right now, sorry. If the admins like to pas that informacion to an other place of the forum: go ahead! https://www....

Hi Norton Most of the kickstart gears are 20 teeth which is I think standard 350. I have one at 19 teeth which I believe is 500 6 speed box. The 5 speed box is 23 teeth. Do you know which you have? I can confirm this: - 19 teeth: 500/501 6-Gear (the only one with somehow "pointed" teeth) ...

I think this tank slapper is a fenomen that can happen when after lifting the front wheel it comes down to earth not in line. As far as I know you should grab the handlebar only slighty and acerlerate (perhaps also leaning back to take off weight from the front wheel) without breaking! That is not t...

The best results I´ve got with DID (Y or X or whatever, changing models of the O-rings all the time) O-ring chains. The chain is the first to give up (beginning with becoming longer irregulary), than the rear plate and at last the front sprocket. The DID chains last nearly the double than many other...

If you are not interested in absolut top speed (where do you go with more than real 160 km/h?), I would suggest 39 teeth on the rear wheel for a 501 in a street frame using the standard 520 front sprocket with 14 teeth. Or that´s what I use since more than 20 years.

I have the fork of a 1974 Strada in Dulcinea and dampers are like you describe: longer buches in the bottom, ball valve, only one plastic piston ring, diferent thread of the top plugs in the stachions ... People toll me that the First drum brake models had Paioli leggs in the forks ( maybe with Marz...

If your damper rods have a ball valve on top I'm quite sure that they are Paiolis not Marzocchis.. There is another thread with Fotos talking about these diferentes.

I guess normale they are Marzocchis not Paioli

MickeyMoto wrote: ↑17 Mar 2025 19:05 Or you stall it in gear in a queue and realise you can't find neutral...

Pushing the bike about 30 cm forwards while trying to find the neutral normaly will enter

Wow!
I guess you shold slow down the idling a bit

It may sound a bit strange, but are you absolutely sure that the noise come from the fork? I´ve had a similar noise for years. In the end it was the tank

That's fine!
Nos you'll see that this bikes have had one of the best chasis in their category back n the 70ies. And it's still very noble