AussieSteve
Active Member
Mentioned this in another thread, Rock Solid Engines laser-cut inlet gasket, so some of this is repeated.
Bought a Rock Solid Engines billet aluminium inlet tube with 'O' ring the other day, $35AU + delivery, for HT 2-stroke engines.
Not too impressed. Beautifully machined, looks great, but only 1½" long and straight, so the carb interferes with the clutch cable and is on a 25-30º angle. Also, the 'O' ring isn't quite close enough to the end of the tube to guarantee a good seal with the slots in the carb.
On top of this, the inlet is machined for allen-head screws, so the stock studs must be removed and allen-head screws found.
Score: 3/10 (Would have been 2/10, but it is a good little paperweight and the 'O' ring was useful on my filed alloy inlet.)
Better to save the $$$ and file a groove in a ($10US) after-market alloy tube to fit a (30c) 'O' ring.
See: NT carby/inlet leaks - a reliable solution
Late edit: After the above pic was taken, I filed more off the end of the tube so that the 'O' ring is only about 1mm from the end.
Also, smooth the ragged edges of the slots in the carb opening before fitting or the 'O' ring might be nicked resulting in a poor seal.
On top of this, a bit of 2-stroke oil on the seal when fitting the carb is a good idea.
And finally, ensure that the 'O' ring is fuel resistant or it will swell out of control on contact with fuel. (Been there, done that, years ago)
... Steve
Bought a Rock Solid Engines billet aluminium inlet tube with 'O' ring the other day, $35AU + delivery, for HT 2-stroke engines.
Not too impressed. Beautifully machined, looks great, but only 1½" long and straight, so the carb interferes with the clutch cable and is on a 25-30º angle. Also, the 'O' ring isn't quite close enough to the end of the tube to guarantee a good seal with the slots in the carb.
On top of this, the inlet is machined for allen-head screws, so the stock studs must be removed and allen-head screws found.
Score: 3/10 (Would have been 2/10, but it is a good little paperweight and the 'O' ring was useful on my filed alloy inlet.)
Better to save the $$$ and file a groove in a ($10US) after-market alloy tube to fit a (30c) 'O' ring.
See: NT carby/inlet leaks - a reliable solution
Late edit: After the above pic was taken, I filed more off the end of the tube so that the 'O' ring is only about 1mm from the end.
Also, smooth the ragged edges of the slots in the carb opening before fitting or the 'O' ring might be nicked resulting in a poor seal.
On top of this, a bit of 2-stroke oil on the seal when fitting the carb is a good idea.
And finally, ensure that the 'O' ring is fuel resistant or it will swell out of control on contact with fuel. (Been there, done that, years ago)
... Steve
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