SR 190 kit problems
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Magalluf
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- Posts: 60
- Joined: Fri Jun 18, 2010 5:40 pm
- Location: Mallorca (Spain)
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Hi all, I have an SR 190 kit which has been sitting in the box for years and I decided to put it on this week as my bike is off the road due to a gudgeon pin snapping. The kit is a Suzuki 64mm piston with the Indian SR cylinder. The cylinder was tuned by Guy Topper and it has a GP crank with a RD Conrod built by Charlie Edmonds so all together it cost me quite a bit of cash and I was really hoping for it to work straight out of the box. Anyway I have built it up and it is leaking basically it doesn't hold pressure at all. I have checked with soapy water and the air seems to be escaping from a small hole in the aluminium near the exhaust port. [youtube]https://youtu.be/V_rm7afkzXA/youtube]Is it possible to repair this or is the cylinder destined for the bin.
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Warkton Tornado No.1
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- Posts: 296
- Joined: Mon Oct 17, 2011 6:16 pm
- Main scooter: Lambretta SX200
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I viewed the video & think the barrel has a pin hole in the alloy casting, most likely porosity.
I would dismantle the engine & evaluate where the hole starts. Most likely in the exhaust port.
With luck, it will be a straightish hole that can be enlarged with a twist drill to the smallest drill size (if that makes sense
) to be pinned with some round bar having an interference fit.
It's the same procedure as repositioning piston ring pegs using the needles from a needle roller bearing. Or you could drill & tap to something like an M3 & Loctite a screw in, I suppose. Each end of the 'plug' will need dressing, obviously.
Whatever you do, if methodical & scrupulously clean, the repair should be a long term fix.
Personally, I wouldn't attempt the repair with something like JB Weld, preferring something mechanical, rather than chemical.
With the cylinder's provenance & likely potential, I wouldn't bin it just yet
I would dismantle the engine & evaluate where the hole starts. Most likely in the exhaust port.
With luck, it will be a straightish hole that can be enlarged with a twist drill to the smallest drill size (if that makes sense
) to be pinned with some round bar having an interference fit. It's the same procedure as repositioning piston ring pegs using the needles from a needle roller bearing. Or you could drill & tap to something like an M3 & Loctite a screw in, I suppose. Each end of the 'plug' will need dressing, obviously.
Whatever you do, if methodical & scrupulously clean, the repair should be a long term fix.
Personally, I wouldn't attempt the repair with something like JB Weld, preferring something mechanical, rather than chemical.
With the cylinder's provenance & likely potential, I wouldn't bin it just yet