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I will have to ask Paul what I payed for it. As i can't remember. It's never been fitted. You are welcome to try it in some case's and see what numbers come up.

I have one of Pauls L5 cams i bought from him some time ago, I intended to fit it to my 410 flattracker, but i am happy with how the sport cam performs so it can go if your interested, I do think some time on the dyno may help point you in the right direction, both bikes on the same day and you will...

I had a test day at leicester speedway on my 350/410 flattracker the other day, it was running fine in the morning but in the afternoon it cutout for a split second coming out of turn 2. ( Turn 1 being the first corner after the start line) It would then pick up go through turn 3 and 4, blast down t...

I have this little lot, i cannot remember if its of a 350 or 501. Are they the same? should have a starter relay from a New York, 501.

501 or 507 cylinder heads wanted. No cracks or bad exhaust threads please.

Great info chaps. It would interesting to see where the gains are in the power band and flow figures, i have to weigh up if its worth the extra work and costs, for a usable gain, as i am usually in 3rd gear racing round 350 mtr speedway tracks, with short bursts of acceleration .

Don't see any PM Harry?

Im thinking of this as a stop gap until the 507 engine is ready, so i do not really want the expense of buying 500 heads, but try and improve the breathing of the 350 heads, I guess i should put up a wanted add to see what kind of price they might be, and i will look out for those oversize 350 valve...

Can anyone shed any light on what it takes to put 500 valves into a 350 head. Do i need new seats? or can the standard seats be cut to suit ? And are the gains measurable? Bearing in mind i have a 375cc conversion fitted.

Is there anyone with the skills and time that can help with a 507 engine build, I am running out of time to get my engine ready for this seasons racing, It is stripped and i have had the crank ground ready for a roller main bearing conversion. All the parts needed i have. I have been quite ill for t...

Could you advise where i can get a copy of the 501 parts book please.

The biggest headache with running these new style ignitions is having to run a battery. Something i have always tried not to do on a race bike, I will try to find out what the draw is on the sachse unit.

Thank you Robert, Yes i was impressed with the torque curve, and yes it do's pull well. It do's have the 350 heads, It was all just an interim/stop gap bike while i get my 507 and my Bsa B50 engines finished. so the winter will bring some changes, The 507 will get done, i want to push some of the bi...

Mine is a New York 507 which i think is the same , So i will go with that j cam to start with, Im looking forward to trying the bigger engine for comparison. What went bang at cadwell? would be interesting to no. If you get the L cam in please let us no how it performs.

20170911_220509.jpg I ran it because i wanted to no if i was in the ball park jetting wise which i was, and to have a comparison for when i get the 507 done. I think the torque curve is pretty useful for the short speedway tracks that we use, i will gear it accordingly in future. My big decision is...