Scott's NC30 Track Bike Build

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NGneer
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Re: Scott's NC30 Track Bike Build

Post by NGneer » Thu Jul 12, 2018 9:18 pm

TZcRank wrote:
Wed Jul 11, 2018 1:19 pm
Has anybody bought a set of Ali radiators advertised on E-bay?
Are they any good, price seems slightly low for what I would expect?
Scott Jelleyman (member on here) sells them and is the guy you want to speak to. He has dealt with the Company to refine the product (lugs /mounting Points etc) and the ones through him also come with the curved top rad which fits better. ;)

pptom
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Re: Scott's NC30 Track Bike Build

Post by pptom » Fri Jul 13, 2018 8:41 am

As above. Brought some from eBay, looked great but a terrible fit. Wouldn't work with the fan without reengineering the bracket, then it fouled the fairing. Top one needed new brackets making, then the cap fouled the fairing and they wouldn't work with my oil cooler pipework. I spent hours on them and finally gave up.
On another bike I got some through Scott Jellyman and they were spot on, about £120 I seem to recall?

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Re: Scott's NC30 Track Bike Build

Post by TZcRank » Fri Jul 13, 2018 12:57 pm

Thanks for the replies.

Jellyman: I will send you a PM.

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Re: Scott's NC30 Track Bike Build

Post by TZcRank » Fri Nov 09, 2018 3:03 pm

Raced short circuit last weekend and an oldish guy who was pit crew for one of the motard pilots had some comments about my bike and where I could improve (always one of them when I'm at the track with a 2 stroke). Anyway, we got to chatting about other bikes and the NC30 came up. He says he won our Powersport (250 2stroke and 400's) class a few years in the early 2000's on an NC30. He said something that was interesting. Apparently the cams are different in the front cylinder and what they used to do was put a set of front cams in the back cylinders. More power apparently.......sound right?

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Re: Scott's NC30 Track Bike Build

Post by TZcRank » Sun Nov 11, 2018 10:16 am

So I'm going with BS!?

blknoel
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Re: Scott's NC30 Track Bike Build

Post by blknoel » Wed Nov 14, 2018 8:22 am

It's true the separate cam assemblies are all different numbers in the parts fiche, but the only way to find out the discrepancies is by measuring cam timings during rebuild, and some members have done engine overhaul so I hope they'll chime in.

My take on this is, as rear cylinders run hotter and in bigger risk of detonation, it would make sense for Honda to be conservative with regards to fueling and/or valve lift/timings. This is confirmed with the carb settings in both the NC30 and NC35 cases. NC30 rear carbs have bigger main jets for more richness, lowering temps. And NC35 carbs albeit using same MJs throughout, are mated to different emulsion tubes front/rear, supposedly achieving the same effect.

So it is quite possible that the rear set of Cams on these engines might be a tad tamer in profile compared to the respective front sets, hence the suggestion swapping the rears for another set of fronts would find a tiny bit more HP which matters for racing, at the expense of durability. As said though, the only way to find out is to measure them back to back.


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