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Montesa 315R 2002 D.Lampkin factory replica


ahell
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First observation about the Mitani aluminum clutch.
It perfectly releases the transmission when disengaging.
The neutral selection is excellent even when cold and I can significantly lower the engine idle speed.
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Posted (edited)
I machined a keihin to 32.30mm to fit it into a remanufactured pipe.
The original dellorto is 31mm.
It fits without forcing.
A quick dremel work to pop the pipe lug and remove the shoulder due to the original 26 diameter.
I will test Josep Banyeres' sleeve to adapt the airbox. Otherwise I will install a TRS sleeve.

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Edited by ahell
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  • 3 weeks later...
Replacing the intake manifold to install the Keihin carburetor requires removing the engine. A screw is inaccessible...
A quick stroke with the Dremel to adjust the manifold diameter to the white plastic part that fits into the reed valve.
This gave me the opportunity to add an extra 0.5mm base gasket, following J. Banyeres' advice.
The Italkit S3 piston and connecting rod are perfect. This was a good opportunity to check the previous work.
45/125 jets. It seems like a good base.
New footpegs, more in line with Lampkin's bike.

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48 idle jet (adaptable), 3/4 open air screw.
I'll try a Keihin 48 jet to see if my adaptable jets are properly calibrated because I thought I'd see more difference between a 45 and a 48.
I made three 3.5mm shims to shift the airbox further back because the carburetor and adapter piece assembly are longer than the Dellorto's.
The engine is soft at the bottom.
I didn't lighten the flywheel on this one.
The extension seems better... test on the flat. We'll see on the climbs.
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