mb reed valve

[camel]

hi,ive posted a similar post asking your opinions of actual users of the ads3 pipe,id like to do the same for the mb reed valve before i invest.
So....who is using one...what do you think?
what barrel are you using
i realise im not going to bolt one one and its going to just work,i intend to cut a boost port and use a piston with windows.
basically im asking people who have the reed valve....is it worth the investment...what have you gained.
many thanks in advance

[coaster]

I'm using one with an Indian Ally barrel, boost port and windows in the piston. I'm very pleased with it, I wanted to reduce the spit back through the carb and it has pretty much eliminated that. I'm still fiddling with it and have learnt a lot and will probably do another barrel BUT I recently added up how much I've spent on playing about with these ally barrels and was shocked to find it was well over £700 ok, £200 or so of that was before I fitted the reed valve but it does all add up. £140 ish for the MB reed and manifold then throw in a piston or 3 and you are knocking on thr door of a TS1

[jonny wadd]

Ask Jason frost from absolutely scooters... He runs one on his own scooter, and has fitted a few.. Mb reed valves to other bikes.. He will be able to give you the pros and cons etc...

[Oldgit Dave]

Hi
I have both the MB reed Valve and an ADS 3 fitted to a rapido 250
Dellorto 30 mm PHBH jetting 48 pilot av 268 40 slide 125 main no filter crank MBD 60 mm stroke 110 rod 3mm packer li125 gearbox with 47 20 sprockets 4.33 ratio 5 plate clutch sil Ign with 2KG flywheel.
Pulls from twenty five in fourth easily two up sits at 65 (Vapour Speedo) all day at a temp of 21o deg F reed valve reduces s**t on the floor boards and panels makes for a good touring rig

Hope this helps

Dave

[corrado]

Did you modify the piston dave?

[Oldgit Dave]

Yes piston modified but no extra porting at the moment ! (Busy playing with my other engine with avanti kit now)

[corrado]

What's the 250 like on fuel? Did you convert it from a running piston port 250 or build it with the reed valve?

[Oldgit Dave]

What's the 250 like on fuel? Did you convert it from a running piston port 250 or build it with the reed valve?

Better than it was on piston port I have to be honest and say by how much I do not know. (Better than my boy's RB20 :bouncing: )
The first Rapido barrel was run piston ported but I quickly became tired of fuel all over floor boards and panel as well as on engine, so was boost ported as well as piston being modified BUT then the stud threads ripped out and it was reving on very well till it seized (we all know that one ) 2 up coming back from the Ron Moss open day on the A27. Wifey was on back so Avanti kit was more or less signed & sealed at that point LOL.
So new crankcase and another Barrel/Piston an MBD 60mm crank with 110mm rod 3mm packer was used on rebuild LTH V2 reed valve replaced byMBD Reed Valve piston cut but but barrel left stock for comparison to previous boost ported barrel.
How does it compare well it's an all round stump puller if I was to say power comes in at around 4200 its not a startling change and with the ads 3 it revs through to 6800 it carry's on reving but it's more noise than go.

Oh an it sounds more like a crosser than a lambretta

Hope that helps

[camel]

What's the 250 like on fuel? Did you convert it from a running piston port 250 or build it with the reed valve?

Better than it was on piston port I have to be honest and say by how much I do not know. (Better than my boy's RB20 :bouncing: )
The first Rapido barrel was run piston ported but I quickly became tired of fuel all over floor boards and panel as well as on engine, so was boost ported as well as piston being modified BUT then the stud threads ripped out and it was reving on very well till it seized (we all know that one ) 2 up coming back from the Ron Moss open day on the A27. Wifey was on back so Avanti kit was more or less signed & sealed at that point LOL.
So new crankcase and another Barrel/Piston an MBD 60mm crank with 110mm rod 3mm packer was used on rebuild LTH V2 reed valve replaced byMBD Reed Valve piston cut but but barrel left stock for comparison to previous boost ported barrel.
How does it compare well it's an all round stump puller if I was to say power comes in at around 4200 its not a startling change and with the ads 3 it revs through to 6800 it carry's on reving but it's more noise than go.

Oh an it sounds more like a crosser than a lambr
Hope that helps

yes it does
thanks for your opinions

[corrado]

Sounds good Dave.