I knew the 250CSR head fitted the 350 barrel, but did not know you could mount the 350 barrel to the 250 bottom as the bike in this ad claims:
http://www.carandclassic.co.uk/car/C832146
I thought the 350 difference was taller barrel (stroke 10mm longer, bore 3mm wider) so is this conversion not just likely to give very low compression?
350 barrel on a G2
- BultacoBen
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350 barrel on a G2
http://www.ben-eddings.com
1966 Matchless G2 CSR scrambler
1986 Suzuki DR600 long-range explorer
1971 BSA B50T street tracker
1966 Matchless G2 CSR scrambler
1986 Suzuki DR600 long-range explorer
1971 BSA B50T street tracker
- clanger9
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Re: 350 barrel on a G2
Presumably it's got a 350 crank, rod & piston as well? Fitting just the barrel & head would make no sense...
1989 Moto Morini Dart 350
1993 Ducati 750SS
1993 Ducati 750SS
- Ozmadman
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Re: 350 barrel on a G2
Yes, it would have hardly any compression if not. Plus it is well overpriced even with a grand off it would still be expensive!!clanger9 wrote:Presumably it's got a 350 crank, rod & piston as well? Fitting just the barrel & head would make no sense...
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
- ajscomboman
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Re: 350 barrel on a G2
It wouldn't have any compression at all, 250's have a 69mm piston 350's use a 72mm.Ozmadman wrote:Yes, it would have hardly any compression if not. Plus it is well overpriced even with a grand off it would still be expensive!!clanger9 wrote:Presumably it's got a 350 crank, rod & piston as well? Fitting just the barrel & head would make no sense...
- Janet
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Re: 350 barrel on a G2
On the bright side, it's unlikely ever to seize in the barrel.ajscomboman wrote:It wouldn't have any compression at all, 250's have a 69mm piston 350's use a 72mm.Ozmadman wrote:Yes, it would have hardly any compression if not. Plus it is well overpriced even with a grand off it would still be expensive!!clanger9 wrote:Presumably it's got a 350 crank, rod & piston as well? Fitting just the barrel & head would make no sense...
- ajscomboman
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Re: 350 barrel on a G2
[quote="Janet" On the bright side, it's unlikely ever to seize in the barrel.[/quote]
- Ozmadman
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Re: 350 barrel on a G2
I was presuming that at least they put the 350 piston in!!!ajscomboman wrote:It wouldn't have any compression at all, 250's have a 69mm piston 350's use a 72mm.Ozmadman wrote:Yes, it would have hardly any compression if not. Plus it is well overpriced even with a grand off it would still be expensive!!clanger9 wrote:Presumably it's got a 350 crank, rod & piston as well? Fitting just the barrel & head would make no sense...
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
1960 Model 8
1974 Yamaha RD250B US Model 6 speed
- ajscomboman
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Re: 350 barrel on a G2
Relax Paul, I was having a laugh. They'd had to have put in a 350 piston, goes without saying really.