Stock size piston rings wanted

[scavpan]

Hi Dudes
after 2 full sets (4) of stock size piston rings( part number 13008-055)
Also camchain, crankcase balance weights, tensioners and chain, small starter motor drive gear and chain, any help much appreciated.If you get this message kaptainkwak, send me your phone number as my mobile screwed up and have lost your number, cheers all.
Scavpan

[Kaptainkwak]

Hey scavpan welcome back dude. How are you doing? I have tried to ring you a few times but no response. I know why now lol. Will send you a PM with my number. I also might have a few of the parts you are looking for so a call will be good.

Are you coming with us to Luxemburg in June?

[scavpan]

Hi Kaptainkwak
doing ok dude, thanks for your number, nice to hear from you again.
I have a question you or somebody might be able to answer: I have a cylinder head that has got two holes where the early b series hasn’t, i noticed this when I was putting the cam cover on the head because the camcover didn’t cover these holes. The holes are situated just behind the exhaust cam on the head and look like oil or breather holes. I have bought the head without the cam cover so I don’t have a cam cover that fits to cover these holes. I’m wondering whether I can run the head with the holes open to atmosphere, but I presume not, any help much appreciated. If I have a bike on the road, I will definitely be with you to Luxemburg.
Best Regards Y’all
Scavpan

[Kaptainkwak]

Simple answer there is no you can’t. That cylinder head is from a CSR or LTD model which has the recirculation system fitted and would also require ta different rocker cover, rocker cover gasket, reed valves, pipework and vacuum valve for the airbox which will not fit into a B airbox.. The B models don’t have that. I will willingly swap you for the correct cylinder head if you wish.

[Michael]

Hi guys,

KK is right 😉
That’s a CSR cylinder head and must be used at least with a CSR/LTD cam cover !

Go on and swap the head with a B’s cylinder head !

Cheers, Michael

[scavpan]

but can the holes be blocked off, where do the pressure gases come from, I cannot see how blocking them off can be detrimental to the running of the engine as it is an emission regulation that was implemented later than the B model, but I cannot see what else they changed. It cannot pressurise the engine as it already has a breather.
scavpan

[Michael]

Hi scavpan,

that “canal” goes directly to the exhaust port. You can see a hole close to the outlet valve.

Original idea is to get some fresh air via tubes, vacuum switch and controlled by a membrane into the exhaust when there is lower pressure than on the intake side to “reburn” the fume and minimise hazardous substances in the exhaust gas.
The membranes are mounted in the cam cover, where the two small covers are located approx above exhaust valves. The membranes just allowed fresh air to enter the exhaust. Exhaust gas was blocked by the membranes (CSR) or by the two small covers (LTDs).
That circuit is completely separated from air contained in the motor itself.

You may block that “canal” and everything should still work fine with all the other components coming from a B-model.
Maybe cutting a thread in it and close it with a screw and copper ring can be a solution ?

Cheers, Michael

[Kaptainkwak]

Ouch. What Michael says will obviously work but to me it is criminal damage to a CSR head especially when I am after one and have a spare B head.

I know you have refurbed the head and I am willing to take business of an exchange to compensate you for your efforts.

[Michael]

KK,

you are absolutely right !

Guys, get the heads swapped !
That is the ultimative solution and would match each of your requirements !

Cheers, Michael

[scavpan]

Thanks for the info michael, much appreciated and informative, now where are those drills and taps!!!!!. Will think about the swap KK.

[Author]

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