- Joined
- Jun 28, 2009
- Messages
- 2,186
Been a bit busy recently working on a Proddy Racer which hasn't progressed much since I mocked it up last year.
Here's where I was up to:
.
I was planning to race it, but that's on hold due to health issues. For now I'll make it roadworthy and see what happens in the future :|
The motor was already PR spec with a 3S cam, 40mm inlet valves and Dunstall pistons, but it was in a pretty sorry state, so I've gone right through it.
I got the crank ground and fitted it with new bolts, Superblends and R&R rods. The cam was scrap due to corrosion so I got a 4S from RGM
It's now got Dunstall 750 barrels & pistons, which were a pain because they need specific fasteners in BSF. I bought a set from a Famous Norton Specialist, but they were unusable, so I ended up getting some bar stock from Andy Molnar and I made my own, which was far more satisfying :wink:
The head had been ported (autographed 'MRO' inside the casting - anybody got any ideas?) and the inlets re-angled for the larger PR valves, but the guides were worn and the bronze seats had pocketed enough to warrant replacement.
Bannister Engines in Preston fitted new Iron seats, which I cut back and blended in - he also did the crank grind; one of the few guys round here who understands what a 90 thou radius means
There seems to be a bit of what may be evidence of pinking around the plug holes, but don't know what can be done about it, or if it will be an issue in future
I put new valves in with Jim's beehive springs and Ti collars, and I took some meat out of the rockers, especially around the extremities.
A pair of 34mm MkII Amals on Maney inlet manifolds rounds off the engine.
I got hold of an original PR headsteady which just needs a pair of spacers making up to bolt to the frame bosses.
I've always liked the high-level pipe look, and although they look great, I'm struggling to get sufficient clearance between the RH pipe and the downtube - need to think about that one :roll:
If I eventually do get it on the track I'll re-think what'll work best - Swarbricks are just a couple of miles up the road from me.
After shelling out obscene amounts of cash on a Quaife box, I didn't want to take any chances with my 'new investment', so I fitted a Maney outrigger and hacked out an old chaincase inner to accommodate it - love that natty welding 8)
So that's where I'm up to... more soon, I hope.
Here's where I was up to:
I was planning to race it, but that's on hold due to health issues. For now I'll make it roadworthy and see what happens in the future :|
The motor was already PR spec with a 3S cam, 40mm inlet valves and Dunstall pistons, but it was in a pretty sorry state, so I've gone right through it.
I got the crank ground and fitted it with new bolts, Superblends and R&R rods. The cam was scrap due to corrosion so I got a 4S from RGM
It's now got Dunstall 750 barrels & pistons, which were a pain because they need specific fasteners in BSF. I bought a set from a Famous Norton Specialist, but they were unusable, so I ended up getting some bar stock from Andy Molnar and I made my own, which was far more satisfying :wink:
The head had been ported (autographed 'MRO' inside the casting - anybody got any ideas?) and the inlets re-angled for the larger PR valves, but the guides were worn and the bronze seats had pocketed enough to warrant replacement.
Bannister Engines in Preston fitted new Iron seats, which I cut back and blended in - he also did the crank grind; one of the few guys round here who understands what a 90 thou radius means
There seems to be a bit of what may be evidence of pinking around the plug holes, but don't know what can be done about it, or if it will be an issue in future
I put new valves in with Jim's beehive springs and Ti collars, and I took some meat out of the rockers, especially around the extremities.
A pair of 34mm MkII Amals on Maney inlet manifolds rounds off the engine.
I got hold of an original PR headsteady which just needs a pair of spacers making up to bolt to the frame bosses.
I've always liked the high-level pipe look, and although they look great, I'm struggling to get sufficient clearance between the RH pipe and the downtube - need to think about that one :roll:
If I eventually do get it on the track I'll re-think what'll work best - Swarbricks are just a couple of miles up the road from me.
After shelling out obscene amounts of cash on a Quaife box, I didn't want to take any chances with my 'new investment', so I fitted a Maney outrigger and hacked out an old chaincase inner to accommodate it - love that natty welding 8)
So that's where I'm up to... more soon, I hope.