modnrod
Well-Known Member
Gday all.
My engine is out, the trans is off to one side (*sigh*), and what do I find? Yep, mains are just through to the copper, the rod bearings have a "hot-spot" smack in the centre, and although on a quick inspection the crank journals look really nice, I haven't mic'd them or checked runout/side clearance yet. I bought my bike as an import from Japan, I knew it had been raced (custom holes for frame braces, wiring connectors on MAP and coil wiring), but didn't concern me, I'd been looking for a good '80s V4 for ages, and this one is nice. I raced it too, but on the very 1st run it skipped while in 2nd........after another sigh, I just rode it around for a bit (it now has 18000km from new - 1987), raced it when I just had too (but missed 2nd gear), and now here we are. It's obviously been buzzed a bit high looking at the mains (I did it once with a false neutral, but only once), and has had a gutful of NO2 (1/16NPT plugs on the inside of the mainfold), so the rings are probably gone too, but haven't got in there yet. Just the usual stuff.
It's funny I reckon the best result from the bike was one of the slowest times.........60ft 1.706, ET 11.78, speed 118.......but that was going 1st - 3rd and 3rd - 5th, coz 4th jumps too (another *sigh*).
Anyway, does anyone have any recommendations as to a particular brand or type of mains and rod bearings, same for rings? Are there any other options besides genuine? The mains have F-780-NG stamped on them, is that a genuine stamp mark, or aftermarket from Federal Mogul? What does everyone use for their rebuild stuff? I figure while it's in bits anyway, I'd rather do it all once. Hopefully it will get me through a few years of having fun.
When it's back together, it will have an air-shifter with ignition kill, back-cuts, slightly lower compression ratio than stock (bottle).......and a REV LIMITER!!!!
All advice from those who've been there / done that warmly received.
Oh yeah, one more thing. What brand of valves does everyone use for their head work? Flat "Milodon" style inlets and high-tulip EVL exhausts? 1mm bigger than stock Suzuki stuff?
Thanks guys.
Dave
My engine is out, the trans is off to one side (*sigh*), and what do I find? Yep, mains are just through to the copper, the rod bearings have a "hot-spot" smack in the centre, and although on a quick inspection the crank journals look really nice, I haven't mic'd them or checked runout/side clearance yet. I bought my bike as an import from Japan, I knew it had been raced (custom holes for frame braces, wiring connectors on MAP and coil wiring), but didn't concern me, I'd been looking for a good '80s V4 for ages, and this one is nice. I raced it too, but on the very 1st run it skipped while in 2nd........after another sigh, I just rode it around for a bit (it now has 18000km from new - 1987), raced it when I just had too (but missed 2nd gear), and now here we are. It's obviously been buzzed a bit high looking at the mains (I did it once with a false neutral, but only once), and has had a gutful of NO2 (1/16NPT plugs on the inside of the mainfold), so the rings are probably gone too, but haven't got in there yet. Just the usual stuff.
It's funny I reckon the best result from the bike was one of the slowest times.........60ft 1.706, ET 11.78, speed 118.......but that was going 1st - 3rd and 3rd - 5th, coz 4th jumps too (another *sigh*).
Anyway, does anyone have any recommendations as to a particular brand or type of mains and rod bearings, same for rings? Are there any other options besides genuine? The mains have F-780-NG stamped on them, is that a genuine stamp mark, or aftermarket from Federal Mogul? What does everyone use for their rebuild stuff? I figure while it's in bits anyway, I'd rather do it all once. Hopefully it will get me through a few years of having fun.
When it's back together, it will have an air-shifter with ignition kill, back-cuts, slightly lower compression ratio than stock (bottle).......and a REV LIMITER!!!!
All advice from those who've been there / done that warmly received.
Oh yeah, one more thing. What brand of valves does everyone use for their head work? Flat "Milodon" style inlets and high-tulip EVL exhausts? 1mm bigger than stock Suzuki stuff?
Thanks guys.
Dave
