2012 hill climb bike running

[MadAd]

Think it's going to take some sorting to get the fuelling straight!!

From what I have read the Air fuel ratio should only be 14.7:1 for light cruising and around 13.3:1 for hard acceleration as at 14.7:1 the combustion is too hot, although 14.7 is correct for complete combustion I didn't want to be melting anything.

[Mincehead]

Around 14 and you`ll be fine.

[dandywarhol]

You won't be seeing (or wanting) stoiciometric under full acceleration on a dyno! More around the 13 : 1 or richer as Mad suggests - 12.5 is more the norm for maximum performance in these conditions.
14.7 (lamda1) is what you'd expect under steady load and as weak as 15ish for cruise.

The dyno print out shows too lean throughout the range - I'd be looking at main jet size and dialing in the cams (slotting the sprocket holes) to get the timing spot on after skimming the head.

Remember that 14.7 : 1 is the stoiciometric ratio by mass - in reality (by volume) its nearer 30,000 : 1 - in other words 30,000 litres of air to 1 litre of petrol, hence the HOOOOGE roar in the induction box

[MadAd]

Main jets are on the shopping list and a spare set of cam wheels have been bought!!

Umm induction roar!! I have never heard roar like the TDM with the pod filter just under my helmet, it's great!!

[dandywarhol]

I'm sure I'd roar if I'd a pod filter under my helmet.............................

[Mincehead]

Edit:

Hey Dandy, you across at the racing this weekend? I`ve got a rare weekend off, will be part of the `normal` spectators for a change.

[Bullet]

Just reading a report in Motorcycle Monthly Prescott Bike Festival page16 ( http://www.mpldigital.com/mortons-media ... e-monthly/ ) that Martin Robbins British hillclimb champion races a TRX, does anyone have any infomation, or if he's a forum member?

[trixynut]

No idea, but a quick search turns up this photo....

http://www.flickr.com/photos/48912169@N00/6911419806/

Looks like a pretty standard bike to me.

[Mincehead]

He`s got a very interesting FS1E too :

http://www.flickr.com/photos/48912169@N ... otostream/

http://www.flickr.com/photos/48912169@N ... otostream/

And here`s a stunning Norton J.A.P V twin:

http://www.flickr.com/photos/48912169@N ... otostream/

http://www.flickr.com/photos/48912169@N ... otostream/

http://www.flickr.com/photos/48912169@N ... otostream/

[Bullet]

Thanks guys, that J.A.P. engined Norton sure looks good.
Prescott Biike Festival
http://www.youtube.com/watch?v=BtQbTVHj ... re=related
and look out for the big bore twin, how do you get such big pistons into such a small barrel?

[Mincehead]

Good God that soundtrack did my head in! Some nice old tools there though.