MB Reed Block for Piston Port.

[Craig H]

When i had it dyno'd first I had a PM pipe on and we only did one run without the air filter on and dont think there was anywhere near as much spit back as I have now with the JL3 but not 100% sure as it was 4-5 months ago. Maybe it is the pipe hopefully Diablo will sort it out this week. FOCKIN SCOOTERS££££££££££££

[lozmondo]

I still think it's a blinding kit though, a reed valve will cure the spitback but it's not just a bolt on job, the cylinder will need to be re-worked otherwise you will loose a lot of top end.

What re working ? mine doesn't rev like it did prior to reed valve .Im still running the Ancilotti and 24mm TM,

[J1MS]

Larger inlet port & piston cut and modded (similar to Jason frosts in his link) this will let the port breath better & for longer...

[lozmondo]

I is running a Jap pison with windows, has a boost port. I was thinking it was over geared but its running LI125 17 tooth front ?

[J1MS]

I is running a Jap pison with windows, has a boost port. I was thinking it was over geared but its running LI125 17 tooth front ?

Have you enlarged the inlet port height or is it still standard.

[lozmondo]

Enlarged and matched to reed block.

Prior to new piston and reed block it was a standard SR piston..with added slap!!..running around 175 exhaust 150 inlet 124 transfer.

I am guessing the now shorter barrel for the Jap piston has dropped the exhaust timing? it runs a 60mm 107mm rodded crank. It has been an engine developed over time in stages, hence the mix of components and just to see what could be achieved with these kits .

It pulls like a train, just runs out of steam a bit ??

[coaster]

Done a few even have one on my own bike some pictures here http://www.facebook.com/media/set/?set= ... 0853187888

Jason, if it isn't a daft question, I'm using the 6 petal malossi petals and have been running it with the carb in a horizontal position. I'm now wondering if it is supposed to be the other way up to provide a downdraft but it would mean the PHBH being at a sidaeways angle, is that right do you know

Cheers

Colin

[jason frost]

Done a few even have one on my own bike some pictures here http://www.facebook.com/media/set/?set= ... 0853187888

Jason, if it isn't a daft question, I'm using the 6 petal malossi petals and have been running it with the carb in a horizontal position. I'm now wondering if it is supposed to be the other way up to provide a downdraft but it would mean the PHBH being at a sidaeways angle, is that right do you know

Cheers

Colin

Do you mean turn the rubber upside down ?

[coaster]

Do you mean turn the rubber upside down ?

Yes, that's what I meant, with the rubber inverted you get a direct path straight into the cylinder. My 28 PHBH will fit but would need to sit at a very twisted angle as iut's quite a tall carb and the toolbox and long range tank get in the way

I've since looked at Mr B's blog on Facebook and all the pictures on there show the rubber fitted in the horizontal position so I guess I was right in the first place

Cheers

colin

[bigmuff]

I is running a Jap pison with windows, has a boost port. I was thinking it was over geared but its running LI125 17 tooth front ?

Loz,
What piston are you running, and how much was the barrel shortened?
I am running a SR175 ported by Geoff Stephens at present. Crank is 60mm Mec with 107 rod. Have a homemade reed valve manifold with MB cage/rubber i want to use on it and thought RD350 piston may be the way to go. Do not want to rip engine apart to re-rod.

Cheers, Andy.