Cam-swap/engine won't start

[yorkie_chris]

Carbs a yard out of balance?

Possible. I'll play around a bit in a while. Just recovering at the moment - when pulling off the rear spark-plug with the engine going I kinda pulled the HT lead off the plug cap. Unfortunately I was leaning on the frame with my left arm while holding the throttle a bit open. Got a lovely second or two of electric shocks before I let go of the HT cable. Ow.

At idle, rear cylinder doesn't seem to be doing much, but is firing. At low revs the bike will stall. Get it above 3k and it's fine, put it above 7k and it spits fuel back through the rear carb and bogs down something fierce.

Intake problem? I'm going to limp it down to the local mech's tomorrow while I'm having my eyes tested. Good times.

Haven't you got a compression guage, well cheap too buy One test normal (throttle fully open, and a second test with a cap full of oil in the bore.

Ill post you mine to borrow if you like, have two, so no rush for it back.

Nah, it's ok. Local place won't charge me for anything unless it needs doing, so a compression test from them'll be free. I'm also a bit sick of the sight of the SV at the moment - for the past few months it seems that all I've done is work on it (although admittedly a lot of it was unnecessary - zx6 shock etc.), so I'm just gonna leave it with them. I've got a CBR600RR to use in the meantime, and I'm test-riding an 09 hornet tomorrow...so it may not be around in the garage much longer anyway.

Results are in, and....*drumroll*

One exhaust valve not seating properly. Apparently it's fairly small, and once the engine warms up it disappears somewhat, but with the engine completely cold it makes it very hard to start. It appears, though, it wasn't caused by anything that I did. When I put the new engine in it was a bit rattly, but put it down to a CCT (since the ones on the old engine was quiet). Apparently it was valve noise. Oh, well, something else learned...

Mech's going to recondition the old head, swap it over and change over the exhaust cam at the same time to save me doing it once I got the bike back. Hopefully I'll have a running bike again by Weds morning.

[yorkie_chris]

Make sure you tell him about the different timing marks etc.

Already done. Although the guy's...somewhat experienced. He builds race-engines, machines his own parts (including wheels), and has a 400bhp turbo'd 'busa lying around in his lockup. I'm pretty sure that telling him about the timing marks would be teaching him to suck on fowl orbs

Im lost, what was the air coming out the back area of the engine from then lol?