Is motorcycling allowed?

[Spoke101]

Hmmm - problem #1 - where the hell am I going to find some of these.

 

Anyone have intimate knowledge of MTB headsets - my guess is that this will be my closest option....

 

Just had a quick look no bicycle headset bearing in those spec's

[Andymann]

FSA has one which is pretty close - 41.5mm OD but 30.2mm ID - a bit big, but I can always sleeve the steering tube up from 27.4 to 30.2 - a 1.4mm sleeve will be simple to machine.

 

My concern is how will a bicycle headset handle the extra weight of a motorcycle - even if it only gets used once a year....

[dirtrider]

Does not sound like a good idea to me  . Besides the weight you also reach much higher speeds and hits potholes etc with a very heavy and large wheel .

[Andymann]

Does not sound like a good idea to me  . Besides the weight you also reach much higher speeds and hits potholes etc with a very heavy and large wheel .

My feeling exactly.  Although the top speed of a 1930 GTP is only a whopping 60kph

[Spoke101]

FSA has one which is pretty close - 41.5mm OD but 30.2mm ID - a bit big, but I can always sleeve the steering tube up from 27.4 to 30.2 - a 1.4mm sleeve will be simple to machine.

 

My concern is how will a bicycle headset handle the extra weight of a motorcycle - even if it only gets used once a year....

 

That could work.

I wouldn't recommend it as a long term solution but to to get the bike moving it should work just fine. I can't see any major danger as long at you ride with in the limits and don't push the bike too hard as DH bikes take a pounding.

The only issue I can foresee it the bearings wearing faster due to the reduced ball size. A  roller bearing will help spread the load but not sure if you get in those specs.

[Andymann]

To be honest the bike will probably only be used once a year on the DJ - the ride from DBN to JHB - that's a regularity run - ave speed probably around 50kph.  And maybe only once anyway - it's bloody hard work riding a vintage bike with 3-speeds, no rear suspension and dodgy brakes on modern roads....

 

Other then that - maybe a ride around the block.

[Andymann]

But right now, without the bearings, I cant carry on with the restoration!

[Thorn199]

But right now, without the bearings, I cant carry on with the restoration!

Just do it. Those original bikes were built using bicycle bits for the most part anyway. A modern bearing should be just fine.

[Spokey]

 

Just moved from Joburg down to Wilderness. Exploring my new surrounds. This on the farm roads off The Seven Passes road.

[Stretched@Birth]

This should be a blast to ride...

 

 

[Steven Knoetze (sk27)]

This should be a blast to ride...

 

 

Now if you could get it road legal.......

[Stretched@Birth]

Now if you could get it road legal.......

Ja, not sure one would get it past the noise level check.

[V12man]

Ja, not sure one would get it past the noise level check.

You only have to do that once......  and it doesn't have to run real well while they do it either....

[lerouc]

Hey guys, have seen this thread a couple of times and i thought i'll just pop in, friend of mine is selling his Aprilia RSV4 R APRC, if anyone is interested, pop me a message.

[Andymann]

if you have a spare 20mins.  If you have ever ridden something from the 1940's you'll realise just how impressive this is!

 

https://www.facebook.com/Goodwood.Revival/videos/1227355390648984

[Andymann]

You only have to do that once......  and it doesn't have to run real well while they do it either....

My Ducati went through the COR with a bunch of Goldilocks stuffed down each pipe!  Barely made it to the testing station, but it passed with flying colours

 

And in the days when it was almost impossible to pass a COR first time, my Datsun failed on a small oil leak from the gearbox.  I sure as hell wasn't going to remove the gearbox for a small leak, so I drove the car to the testing station to be retested  and a few 100m from the entrance I stopped and drained the gearbox of all the oil.  Breezed through the test second time, although the tester did say that the gearbox was a bit "recalcitrant".  I remember I had to look it up!