Running out of puff

[alanp]

Bill, you're quite right, it is mathS, as a short version of mathematicS. 
Regards
Alan

[MG]

Bill, your maths are absolutely correct, but I don't think it will make such a huge difference in top gear performance.
According to my self-made gear-ratio - speed - rpm Excel spreadsheet, the standard gearing (21T-43T-19T-42T) would result in 4050 rpm @ 60mph in 4th gear (4900 in 3rd). Hubies 22T engine sprocket will result in 3860 at the same speed (4680 in 3rd). You might have to stay in third a bit longer, but still it should be pulling well enough in 4th I would think.

All values assuming a STD clutch basket and g'box sprocket is fitted.

[Hubie]

I am running completely standard gearing on the bike now but still have nothing left in top gear.  I am leaning towards cam timing but am still unsure.  I made new rocker box covers last night and now there's no compression and the bike will not start.  I will have to re do the valve clearances it would seem and then go from there.  I made doubly sure that the pushrods are all in position and re checked again this morning.

The saga continues.  I would just like the bike to have the go it is supposed to have.

Cheers,

Dave.

[trevinoz]

Dave,
            Have you ever thought why the previous owner got rid of the Flash?
Check your compression and have a look at the timing marks, as Musky suggested.
Another little thing to check is that the correct idler pinion is fitted.
Count the teeth between the dot and the dash.
It is not unknown for an early long stroke pinion to be fitted.
Trev.

[Hubie]

Thanks again Trev,

I will check that in due course, though I have just reset the valve clearances and the bike is running again.  Not only that but it feels as though there is a stack more power available.  In the past when the bike was revved on the centre the vibration higher up in the rev range would cause the bike to drag backwards along the ground.  Now a blip of the throttle and she rockets backwards.  Perhaps the beast has been awoken.  It has just started to rain here so a test ride when weather and time permits is going to be very interesting.

Thanks to all for their continued advice and support.

Dave

[bsa-bill]

yep mine does that, I use the throttle to move it about the garage.
Well good luck with it when you get it out on the road, it's rained hear in Northumberland through the night, supposed to get sunny this afternoon though