GreasyChris
Well-Known Member
I have an assortment of 1/4 burrs, mostly at work tho. I used this set with the dremel and the whip attachment for the last one. The whip is great for getting way in there.
Time to play. There's no replacement for displacement.
- Thread starter GreasyChris
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GreasyChris
Well-Known Member
So I had to shave about 4mm off the skirt of the piston to get the crank to rotate freely in the case.
So far it's looking really good. With just 2 base gaskets but I think 3 is the ticket. I have a sheet of 1.6 mm aluminum I think a spacer made of that and a gasket either side. The piston crown is just peaking above the deck at TDC with 2 gaskets and the transfers and exhaust ports are fully exposed at BDC, with the skirt trimmed the intake is wide open at TDC. I took some pics. Hopefully will get a chance to get a degree wheel on it this weekend and check port timings, however I have lots of upgrades to do to the bike this weekend so we will see.
So far it's looking really good. With just 2 base gaskets but I think 3 is the ticket. I have a sheet of 1.6 mm aluminum I think a spacer made of that and a gasket either side. The piston crown is just peaking above the deck at TDC with 2 gaskets and the transfers and exhaust ports are fully exposed at BDC, with the skirt trimmed the intake is wide open at TDC. I took some pics. Hopefully will get a chance to get a degree wheel on it this weekend and check port timings, however I have lots of upgrades to do to the bike this weekend so we will see.
gary55
Well-Known Member
I bet this thing is going to get with it.
Spare_Parts
Well-Known Member
Damn that's close!
GreasyChris
Well-Known Member
I haven't had alot of time to play with the new build this week but I have decided that I'm not going to do a case reed on this engine. Im going to do a dio reed setup on the sleeved jug. I just got the reed in today.
It's bigger than the BGF valve I just got. I got lots of work ahead of me on this build. Thanks to @Spare_Parts for hooking me up with the milling table.
Did some tinkering and with 2 base gaskets and 1 stock head gasket the engine rotates all the way thru and the piston just kisses the head. 3 base gaskets and its nice and free. Hopefully I'll get some degree wheel readings soon with different gasket set ups and see where the ideal timings should be.
It's bigger than the BGF valve I just got. I got lots of work ahead of me on this build. Thanks to @Spare_Parts for hooking me up with the milling table.
Did some tinkering and with 2 base gaskets and 1 stock head gasket the engine rotates all the way thru and the piston just kisses the head. 3 base gaskets and its nice and free. Hopefully I'll get some degree wheel readings soon with different gasket set ups and see where the ideal timings should be.
Spare_Parts
Well-Known Member
Ah man, no case reed! Guess I'm on my own now 
A dio on a cylinder that will last is a great idea. Now rob is going to start selling them lol.
A dio on a cylinder that will last is a great idea. Now rob is going to start selling them lol.
GreasyChris
Well-Known Member
Lol im still gonna make a case reed for my G4 jug.Ah man, no case reed! Guess I'm on my own now
A dio on a cylinder that will last is a great idea. Now rob is going to start selling them lol.
GreasyChris
Well-Known Member
So I've had some time to work on the new build. Unfortunately my dremel broke down and I've been waiting for the new heavy duty one to arrive so I can finish the port work on the jug. However I managed to mill down the intake side of the jug to accept the Dio reed block. I did this by hand with a heavy duty metal rasp and and air operated belt sander. Took about 30-40 minutes. Hopefully the new dremel will be in any day now and I can finish up the port work and get the final measurements.
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Spare_Parts
Well-Known Member
Nice work! Bet that was fun lol.
GreasyChris
Well-Known Member
Thanks, actually wasn't that bad, the rasp I used worked really well, kinda like grating cheese lol
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