Exhaust

[Kevin N Bayliss]

Has anybody got a front pipe for a 500 s/stroke, that they don’t want, Right or left hand. Thanks Kev

[Dripfeed]

Hello Kevin I have a L H pipe and silencer fitted to my 1929 ss 500 tourer the system is unused and plated . I need a coffee pot system for the bike and would exchange my exhaust for a good c p system, Regards D F.

[Orgasmatron]

Kevin,
Jeff Reed is selling one on Ebay. Have a look under ‘Motorcycle Parts’ and ‘Scott’. He has quite a few other parts that he is selling as well.
Chris.

[Kevin N Bayliss]

Thanks to both, unfortunately I do not have a coffee pot system and the one on eBay is for a 600cc, I don’t know how much of a difference there is in size but i’m sure someone will tell us. Any condition 500 front pipe will do as it will let me see if it will fit my Special, left or right hand. Kev

[Orgasmatron]

Kevin,
I don’t think that there is any difference between a 500cc and a 600cc exhaust (of this type anyway). I recommend that you don’t let it get away. I had a TT Rep exhaust made by Competition Fabrications a few months ago (as it so happens, using a 2″ diameter pipe lent by the same Jeff Reed) and not only did it cost a lot of money, but was quite problematical.
Chris.

[BRIAN MARSHALL]

HI, There is no difference between 498 and 596 exhausts, but there is a big difference between long-stroke and short-stroke exhausts as the exhaust ports are much smaller on a short-stroke.
Brian

[Kevin N Bayliss]

Thanks for that Brian, Kev

[Colin Butler]

Hi kev have a left hand alloy 500 frount pipe + short steel pipe and tatty silencer give me a ring on 01608 684586 after 6pm, Colin.

[BRIAN MARSHALL]

The alloy L/H manifolds were only made for short-stroke engines, and are not suitable for fitting to long-stroke blocks due to the different port sizes. Later alloy manifolds, made by the likes of AE Reynolds, might be different, but check carefully before buying.
Brian

[Kevin N Bayliss]

Colin I will call you later tonight as my engine is a short stroke, thanks for the info Brian, Kev.

Now have the exhaust, time to play…. Kev

[Steve Gibbon]

Hi, I had been looking at the alloy manifold on EBay too. Does anyone know what the approximate exhaust port dimensions (measured on the outside of the block) are for long and short stroke engines ?

I have two blocks both of which I was told were 600’s . The external exhaust port openings measure :

block 1, 51mm wide x 21mm high with 69 central space between them (this block has approximately 75.4 mm bores and curretnly fitted to a ‘FZ’ numbered originally 498cc engine with approx 68mm stroke) – presumably this is a ‘short (68.25mm) stroke’ block ?

block 2, 49 -51mm wide x 24mm high with 70mm central space between them (This is a spare block – told it was a ‘DPY’ has a bore of approx 73.3 mm – presumably this is a ‘long (71.4mm) stroke’ block ?

So if I have a long and a short stroke block, the difference as far as the exhaust manifold is concerned is the height of the exhaust ports, which are ~ 21mm high on a short stroke block and 24mm on a long stroke block?

regards
Steve

[Jeff Reed]

Just for the record I have posted a picture of the alloy exhaust manifold next to the one of the exhaust manifolds from the batch Paul Rickards had commissioned. These were for 600 blocks. Jeff Reed

[Jeff Reed]

Meant to say long stroke rather than 600. Jeff Reed

[Kevin N Bayliss]

Colin, arrived today many thanks Cheque is in the post, Kev

[Author]

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