Steering Head Mods for 180 Triple frames

[helicopterjim]

I was thinking about the thread on steering head cracks and some of the mods that were done. I really like what Grant has done to his bike POP and I think a few others have done the same.

I wonder how many people would be interested if someone could build a kit that would have the necessary bearing tube extension and a new steering head spindle that would only require the purchaser to weld (or have it welded) to their frame. Not an easy job but a good winter project.

Here is the photo of the mods done to Grants bike and to an RGS I believe. I think it would be a nice kit.

Jim

 

[bazzee]

Interesting proposition. What about bracing other areas of the frame (e.g. swingarm pivot) at the same time? And while we're at it stick in a box section swingarm.

Which is to say, I would be interested...

cheers,

bazzee

 

[helicopterjim]

Interesting proposition. What about bracing other areas of the frame (e.g. swingarm pivot) at the same time? And while we're at it stick in a box section swingarm.

Which is to say, I would be interested...

cheers,

bazzee

I think it would make an interesting kit to beef up a bike while keeping in line with suspension and brakes of the day. I agree that the swingarm pivot could use a bit of help ........ the box section swingarm is nice too but that's a big step cost-wise (maybe). I don't know of any bracing to improve a stock swingarm.

Bring on the info!

Jim

 

[Dellortoman]

I spent a long time looking at the swing arm pivot on the RGS frame when I built a track bike out of it. I came to the conclusion that the plates in which the pivot is mounted are plenty strong enough, but the frame around it could be stiffer. It's kind of like a cardboard box without ends in it. It can flop sideways. I ended up putting diagonal braces across the frame above the pivot.

 

[bazzee]

Just wondering what the differences are between the steering spindle for Ceriani triple clamps vs Marzocchi triple clamps.

cheers

bazzee

 

[Paul Marx]

Just wondering what the differences are between the steering spindle for Ceriani triple clamps vs Marzocchi triple clamps.

cheers

bazzee

I think that the parts are interchangeable, but could be wrong.
I remember putting a Marzo on a 750.

Paul

 

[redax5]

there is a fair bit of difference between the two, we machine our own steering stems these days for the Ceriani and Marzocchi triple clamps
Marzocchi on the left, Ceriani on the right, we also have a 3rd version with the through bolt as used on the very early twins/triples

Redax steering stems

 

[Paul Marx]

there is a fair bit of difference between the two, we machine our own steering stems these days for the Ceriani and Marzocchi triple clamps
Marzocchi on the left, Ceriani on the right, we also have a 3rd version with the through bolt as used on the very early twins/triples

Redax steering stems

I must have put the Marzo tubes in the Ceriani clamps then.

Paul

 

[sfcpiet]

I'd be extremely wary of offering a bolt-on/weld-on kit for something like this. Too much specialist machining and welding required, anybody capable of that can make the stuff from scratch... and carry ALL liabilities him/herself.

Slapping this on your bike on a Saturday arvo while enjoying a couple of cold ones isn't on.

piet

 

[CLEMTOG]

If you haven't got a mill big enough , and with space around it to mount the frame with the headstock perpendicular to the table, and the considerable ability to use it, then you will be wasting you own time, having a few kits ready for the specialist to fit and true might be a good idea, but I doubt you would find any maker of such stuff to sell it to you as a DIY kit, the only way would be the finished job on your frame
and he would still do his best to be absolved from any liability.
CLEM

 

[andre g]

I'd be extremely wary of offering a bolt-on/weld-on kit for something like this. Too much specialist machining and welding required, anybody capable of that can make the stuff from scratch... and carry ALL liabilities him/herself.

Slapping this on your bike on a Saturday arvo while enjoying a couple of cold ones isn't on.

piet

I am totally with you. It should not only be done by welding.
When I did mine I spend a Saturday morning in the company with our most experienced man an the huge milling machine and he made the final work at the headstock bearing rectangular to the swinging arm bolt.