The 50

[TZ350]

Sounds Great.

[andrew a]

That dose sound very good.

[cotswold]

I am having some work done on my fancy new head and as there are no points rounds for a while this is the perfect time to do it.
Roger supplied the head for me for which I am very grateful as VHM no longer make them.
The piston looks good after 2 rounds of racing and the bore looks as good now as before use.

[F5 Dave]

So that's a blank insert. Or are you building the hell high compression engine?

[richban]

I am having some work done on my fancy new head and as there are no points rounds for a while this is the perfect time to do it.
Roger supplied the head for me for which I am very grateful as VHM no longer make them.
The piston looks good after 2 rounds of racing and the bore looks as good now as before use.

I saw the pics on facebook. Is that piston a dome top? Looks that way. I think the toroidal design was best for a flat top piston and the RSA style, steep wall bathtub good for the dome style piston. We run the later on the 300's and they seam to work well. Also you must be able to run a really tight squish on the 50. I would be going for .6. Should say will be going for .6 I have joined the 50 arms race and hope to have mine flying for the F5 gp. RS50 that is.

[cotswold]

I saw the pics on facebook. Is that piston a dome top? Looks that way. I think the toroidal design was best for a flat top piston and the RSA style, steep wall bathtub good for the dome style piston. We run the later on the 300's and they seam to work well. Also you must be able to run a really tight squish on the 50. I would be going for .6. Should say will be going for .6 I have joined the 50 arms race and hope to have mine flying for the F5 gp. RS50 that is.

Rich we had .54 squish
Thanks for the info on head shape as I was going toroidal but a European mate and now you have said bath type, I'll stick a photo of his when I get home
Pleased you are putting a 50 together be great to see a grid full at the GP
YOu should leave the motor stock 👍🏻

[F5 Dave]

Good on ya Rich, pity the grids fill as I'm out. But I have a plan for a rider.

0.5 no trouble. Used to reuse base (2) gaskets. Too many times and you'd hear tikitatikitatikita as it closed up a tickle more.

[cotswold]

Here are 2 that were given to me by FB friends one being Roffe Heljefors and he should know as he makes these with a 10mm plug

[cotswold]

Other. Photo .......,,,,

[Bert]

Other. Photo .......,,,,

Very Yamahish...

[Henk]

Good on ya Rich, pity the grids fill as I'm out. But I have a plan for a rider.

0.5 no trouble. Used to reuse base (2) gaskets. Too many times and you'd hear tikitatikitatikita as it closed up a tickle more.

If plan A falls through, I'll ride your bike, only chance I would have of taking it to Malcolm.

Anyone else planing on trying to collect the whole set? I know the hillbillies are building sidecars.

[cotswold]

Jan Theil posted this a while back and I forgot to note down which bike it was for, as Frits has his name all over it he may feel inclined to say ?

[husaberg]

Jan Theil posted this a while back and I forgot to note down which bike it was for, as Frits has his name all over it he may feel inclined to say ?

This is another one they did
It might help to leave a trail of breadcrumbs

Frits posted the pipe dimensions of the most winningest 50 in Europe as well a while back



Plus one of Wobs from memory for I know not what

[cotswold]

This is another one they did
It might help to leave a trail of breadcrumbs

Frits posted the pipe dimensions of the most winningest 50 in Europe as well a while back



Plus one of Wobs from memory for I know not what

So as mine is pretty much square if one were to use an appropriate bit o maths could one use this as his template?

[husaberg]

So as mine is pretty much square if one were to use an appropriate bit o maths could one use this as his template?

That would be a question I would ask the resident physicist he would I think welcome a non Ryger not really Aprilia question I imagine.
I say yes , not I am not really that clever