MB TTT one off Reed Cylinder x


Marks TOURING TORQUEY TUNE Cylinder the 3T's

As I was bashing ideas around my head designing the Race-Tour cylinder kit I wanted to do a Reed Valved cylinder, but the extra cost meant it would have been so expensive it wouldn't have sold. I knew producing a good cylinder in the UK was going to be expensive any way. I've always been one to do a lot of one off cylinders my Power Valve cylinder is well documented. When I took the plunge to make the RT kits I had been playing around with some other cylinders, originally the first cylinder was going to be a TS1 style copy but with better porting spec. This cylinder was delivered to the pattern makers who sat on it a few weeks, I was busy any way, the pattern makers wanted me to alter it in some way when I picked it up a few weeks later it just wasn't right. It's strange you work on a design everyday for weeks and think, perfect, forget about it, leave it a few days or a week or so and re address it and you seen things you didn't before. This reed cylinder used a blank Monza and used Boyesen ports from the inlet port into the transfers which I had done in 91, remind you of anything? Yes the RB! I also had sub exhaust ports either side of the exhaust port and above the transfer ports which I had done in 96, remind you of anything? Yes the Super Monza! And this was before the RB or Super Monza had come out.

If I'd pulled my finger out I would have been years ahead of the RB and Super Monza. It was so close, if the pattern makers had pulled their finger out we would have had a high powered kit. When the first RB was delivered to the Koln show I asked Airsal if I could see it, the answer was.......... why are you asking, everyone is asking it's the most asked about cylinder we have ever made, we can not show you until Mr Kemp visits us tomorrow! That night I went out with the Koln guys and met a German Scooterist who had managed to see the first RB and described it to me! Exactly how I had designed my one off cylinder! Dam I had dragged my heels too long and Ray had beaten me to a new cylinder. On the way home at the airport there was a que for the plane, at the back was Ray and Ben in suits with a bag. We swap pleasantries but I saw the look in Rays face 'Of all the bloody people to bump into it's that gob shite Broadhurst! Minutes later Sticky turned up, I told him Ray had the cylinder in the bag and Sticky did his best to get to see it. I think if I wasn't there it would have come out, but me and Ray had crossed paths when the Rapido out. Me and Ray got over our little misunderstanding after I apologised and we've been fine ever since. I still have his hand typed letter some where threatening us with court action and demanding we paid our bill. At the time I did the right thing made a phone call and appologised to Ray, Ray even sent me a really nice hand written Christmas Card after our troubles last year and contrary to popular belief I really like Ray and always have. Anyway Sticky did his best to worm out seeing the new RB and Ray was having non of it. We even suggested that it would make a great photo of Ray and Ben landing in the UK with a photo of them holding the new cylinder on the runway! I even suggested I would be nowhere near so no secrets was let out and still no joy. It was hilarious when we got off the transfer bus and Ray and Ben ran off across the tarmac and was first through pass port control never to be seen again!   
   
I had been doing Reed Cylinders before the TS1 came out, I knew the benefits but fitting a Reed on the left side was difficult. I did toy with doing a Reed Touring cylinder which could have been the RT. But it looked impossible to do and keep the carb in the standard place to use the air filter box. I'd done it using the Kart Reed block off the GT 190 cylinder with my power valved engine but I wasn't happy with power output because of the reed. In the end I did a piston ported cylinder which we called the Race-Tour cylinder simple and filled a gap where we saw a higher percentage of people who would have bought a kit. As we did the RT kit there was a demand for a new bolt on Retro Reed Valve, again not an easy job to get close in. I kept looking at the problem and addressed the issues over a 3 month period, researching Reed blocks and rubbers and in the end the only way around it was to machine fins to get the Reed as close to the piston as possible, this was called the MB Shorty Reed Block. As I kept addressing the Reed Block conversions I really wanted to use the Yamaha RD350 power valve or Banchee Reed Block for reasons listed everywhere. I had been using these since 1985 with no problems at all, we could get good supplies and spare Reed Petals any where. But the block is big when you think it's not.

And it's here I decided a new cylinder could be made, based on the RT kit which is excellent and under rated but with a Yamaha block added and aimed at a very simple torque monster engine that would suit everyone from a engine using a 18mm carb to a 35mm carb.

I've not put it into production, Scooter Center have put the piston ported RT cylinder into production to see how they sell, we can never predict these things and given time without pressure I would have gone down the road of this one off cylinder as the BGM version. I designed this cylinder for my own Pushpak which now lives in the shop and was built for the Euro in Spain. In the end I didn't go as the ignition let me down 3 hours before the ferry was due.

The plan was me and Mouse was going to the Euro together, me on my Pushpak with this cylinder......... 5 speed gearbox.......... 9 plate clutch......... the list is too much. As I had finished Mouse's bike and done a few engines for other people to get to the Euro and done all the tests on the new MB Clubman I had left it too late to get mine done on time, even though I started the Reed Cylinder 8 months before! Mouses used one of the first RT kits I knew the bhp of it after a few years of development and testing and had to de-tuned mine to ride with Mouse the long way round through Europe. Even though de-tuned my bike both bikes we set to cruise at 70 all day, trust me we had been out testing on long rides and races for 2 years before the RT hit the road. Mouse's Green bike was around 21bhp mine was around 25bhp.

So here it is and maybe one day we may produce this reed cylinder. 


An old TS1 reed block the same as a Yamaha reed, with a ground away RT cylinder and attempting a inlet new port



I even bought a complete old SIL bike to use as a model for the set up, the reed block looks massive, from here I welded a solid inlet manifold and ground it to suit how I wanted



I've lost count how long it takes to do this kind of work, bear in mind that inlet was solid alloy to start with, then I ground it all out to suit the Reed Block inside and out



The MB RT exhaust flange it's the only one in the world with a 4 studded flange and you can still use a standard exhaust



The holes in the top of the cylinder are the 4 normal cylinder stud holes, plus the MB 4 extra head studs



The MB RT transfers are designed large when you need them, no welding required to the casings, just a simple match



The new bridge inlet port to aid piston wear and support the piston



It takes hundreds of hours to weld, grind and cut a port to this shape, usually done late at night out of hours



This bike as always had so many new ideas for testing, as I've always done, designed and developed from day one. This was a new turbo flywheel flywheel fan for testing  



And I pushed it even further, this is MB test 5 speed close ratio gearbox



The inlet manifold was a one off, it was flowed with stuffers inside to to improve power spread



Mouses bike was finished and 2 years later has not been touched, I spat the dummy out with mine and has sat there ever since



Even this was a special PWK carb, modified with the new BGM fuel pipe



And designed to be ridden as with all MRB products, the gauge is a working exhaust gas temperature gauge and the small one is a CO meter to check air fuel and this was the first Trail Tech Vapor we used on a Lambretta



Used and proven so many times the SIL 3 wheeler fork with after market Biturbo front shockers holding on the original MB disc brake that the far east copied!



Typical of me, I made a one off front rack I called the Elephant rack, this took a few days to get right



With a piss taking Vespa tool box, the alloy box underneath is a special THIRD alloy petrol tank holding 18 ltrs in total



I never stop testing, this is the newer BGM rear shocker with the first 3 stage spring, now a standard for BGM and with not one complaint in 2 years, the spring was designed over the phone on a Wednesday night at 9.30pm, it was made and delivered on the Friday we should have set off, it was so fine how I left it till the last minute! Alice said you do this every year! The funny thing is I started 8 months in front of normal



And this is the second one off development of the new MB Big Bore Clubman, Mouse had the 1st before it went into production through BGM



And I've even made rear racks as a one off for when I went to Austria to hold the tent and gear, and also worked perfect for the South of France. One person was looking at my bike and I asked whats up? She said I love your bike every time we stop you've though of everything!  



And the failure of the Spanish Euro, as much as I was promised it wouldn't the Electrex ignition failed, I had designed the spec for the ignition over 4 years but lost it to anyone who paid for it, I bought two with one as a spare but both failed and I never got 20 yards on both! Oh never again



Its hard to see but I designed a new rack years ago to hold a bottle of Rock Oil, how easy is it to have a bottle to hand without having to open a tool box



The Pushpak sat in the old workshop at Edlington



This shows our RT cylinder kits don't need to over abuse casings to make them work, good sealing areas and good power throughout