Phil
2nd Class Ticket
Posts: 38 
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Post by Phil on May 30, 2017 6:35:23 GMT
Hi chaps and chapesses
I was just after some help. I have a vespa px 200 with a malossi 210 kit, 30 mm dellorto phbh with reed valves. My exhaust is a pm tuning expansion pipe which is attached with a U clamp to the cast aluminium exhaust stub. Long story short is the exhaust stub on the cylinder has snapped off so it is now an expensive piece of scrap. It's gonna cost me £350 for a new malossi kit. I reckon the U clamp on the exhaust is to blame. Does anyone have any experience of this?
Cheers,
Phil
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Post by pxguru on May 31, 2017 9:55:00 GMT
Expensive lesson  Those car u clamps can only be used on a standard 200 barrel. Everything else should use a banded clamp. The old Malossi is the worst offender, as the stub is too small. SIP make some thin packers to make it tighter, which work great. |
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Phil
2nd Class Ticket
Posts: 38
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Post by Phil on May 31, 2017 20:54:12 GMT
I know, what a nightmare! So you reckon banded clamps are the way to go. I've seen those sip pieces you mention. Is a really snug fit the way to go? I'll get some. Thank you very much for the advice, I really appreciate it.
Phil
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Post by henri on Jun 1, 2017 7:58:16 GMT
yep as px guru says ,banded clamps press all the way round ,not just on 2 sides like the u-clamps do .an a snug fit=less pressure needed to get a tight seal =less chance of crushing/breaking a stub . cant you get the stub welded an machined ,would be cheaper than a new kit . H
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pecker
1st Class Ticket
Posts: 65
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Post by pecker on Jun 1, 2017 12:24:40 GMT
Hi Phil, Does/did your pipe actually sit flush on the stub  Because with my pm and 166 I had to dremmel of metal inside the pipe a little to allow pipe to sit correctly, All the best Pek |
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Phil
2nd Class Ticket
Posts: 38
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Post by Phil on Jun 2, 2017 5:53:11 GMT
yep as px guru says ,banded clamps press all the way round ,not just on 2 sides like the u-clamps do .an a snug fit=less pressure needed to get a tight seal =less chance of crushing/breaking a stub . cant you get the stub welded an machined ,would be cheaper than a new kit . H Hi Henri, Yep, that make total sense about the banded clamp. I'm gonna order a new malossi kit from Wasp in Morcambe as they seem the cheapest. I'll get a banded clamp and then see how it fits the new stub. If needs be I'll buy the spacers that beedspeed sell to get a snug fit. Then hopefully I can get on with enjoying the great British summer on two wheels! Thanks for the help, Phil |
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Phil
2nd Class Ticket
Posts: 38
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Post by Phil on Jun 2, 2017 5:59:07 GMT
yep as px guru says ,banded clamps press all the way round ,not just on 2 sides like the u-clamps do .an a snug fit=less pressure needed to get a tight seal =less chance of crushing/breaking a stub . cant you get the stub welded an machined ,would be cheaper than a new kit . H With regards fixing the existing cylinder I've had a couple of people take a look at it and both had said it would be a tricky and expensive fix. (Aluminium welding, awkward spot etc) I think I'd rather just suck it up on this occasion. Also it a chance to buy the nicer 2016 spec kit! |
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Phil
2nd Class Ticket
Posts: 38
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Post by Phil on Jun 2, 2017 6:03:32 GMT
Hi Phil, Does/did your pipe actually sit flush on the stub Because with my pm and 166 I had to dremmel of metal inside the pipe a little to allow pipe to sit correctly, All the best Pek Hi Pecker, The fit was fine. However it was on the scoot when I bought it so it may have fettled when initially fitted. I am however left wondering how to get the snapped exhaust stub out of the exhaust. It is well and truly stuck in there. I'm thinking it needs to be the Dremmel to the rescue. |
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Post by mijapxman on Jun 3, 2017 15:59:48 GMT
Seen metal exhaust stubs fitted to Malossi 210 kits. 
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Post by mijapxman on Jun 28, 2017 8:26:35 GMT
For anyone interested,Worb5 has Malossi 210 kits with metal exhaust stubs fitted, so looks like they can be repaired.
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Those car u clamps can only be used on a standard 200 barrel. Everything else should use a banded clamp. The old Malossi is the worst offender, as the stub is too small. SIP make some thin packers to make it tighter, which work great. 
Because with my pm and 166 I had to dremmel of metal inside the pipe a little to allow pipe to sit correctly,
