Racing Mosport

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Doug MacRae

Doug MacRae

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I never did post up this video, from my last race at Mosport. We have the bike revving much better now, turns out it was just the jetting that was limiting the revs to about 6800, now it will happily sing up to 8500.
This is the Period 3 race, bikes to 1982- a class above me that I bump up into. I have been having problems with my 5 speed the last few years and once again it was raising it's head again at the end.
Big thanks to Fullauto for the excellent head, I can almost keep up with the 1982 racebikes.

[video]https://www.youtube.com/watch?v=8JIN4PErMKg[/video]
 
That seems to be a very expensive way to go racing. Your motor sounds very crisp and you've said you rev it to 8000RPM. I was counting your gear changes. You seemed to change down two gears for only one corner, the rest were mostly just backing off a bit in top gear or perhaps down one gear, then pressing on. It looked as though Mosport is a power circuit - very difficult to get any advantage through better handling and rider skill.
 
Great video Doug.

Who was #444? It appeared to be a Herb Becker Norton and if I were to guess, it looked like Dave Loyd was the rider.
 
Fun video, Doug. Thanks for posting. Painful to listen to those missed shifts. Are you running the TTI gearbox?

Ken
 
Yes, it was Dave Lloyd on the Herb Becker 890, we had some fun out there.

It is not a TT box, it is a 5 speed Triumph cluster in a NRE shell which worked well for me for a while but has been problematic in that last few seasons, mostly in downshifting and finding false neutrals when you would least like to find one. I would love a TT box but after blowing up two expensive motors it is not in the budget for the time being.
 
Thanks Doug for posting, it is winter here so very quite racing wise, none until September now.
Best investment to keep reliabilty up and one less item to have to worry/deal with is the TTI 5 speed if and when you can.
You just need the NZ peso to devalue!!!
Regards Mike
 
Doug MacRae said:
Yes, it was Dave Lloyd on the Herb Becker 890, we had some fun out there.
Click to expand...

Thanks Doug,

Great to see Dave out there. Dave ran the IoM in 1967, started racing a BSA in 1962; he carries himself spryly. Great guy to visit with. You can see him come in and out at 3:02-3:05. Great track by the way.

Doug, any update on whether you and Herb are going to make it to Barber this year?
 
Good one, Douglas.

Liking how you send it in to Moss's. And it looks like they've cleaned the place up over the last few years. (Why, when I was a kid, we used to have to race through blind concrete patches in T1!!! :shock: )

For anyone who has not raced at Mosport - Turn 2 is one of the weirdest, scariest turns out there. Not really seen on the GoPro, but it's an odd one.
There is plenty of skill needed at this place.
 
Hey John, I am hoping to make it down to Barber again, that is the plan.

It is amazing how tame turn 2 looks on video and how daunting it is in real life, you just aim at the horizon and then crest the hill into what seems like a 10 story off camber drop. Mosport has been made much safer with the addition of a lot of paved run off in the last few years.
 
I find that with videos, depth and distance perception is always a problem. In this one it looks as though the straights go on forever.
 
Morning Doug,
Fascinating bit of video! Would you care to share the details of your starter please? I suppose the main thing is the reduction ratio on the end of the motor, but any motor details would be handy.
Cheers, Brian
 
Hey Brian, starter is a car starter motor- I think it was a Ford Escort starter but I am not sure. Herb made reduction ratio gears attached to it to give it more 'stump', something like 15 or 20 to 1 ratio. Works like a charm and the handle of the starter fits on top of a little carriage with a car battery to power it and that is on wheels so you can wheel the little rig up to the grid if you like.
Racing Mosport
 
Thanks Doug,
I have a gear reduction motor from a chev, but now I've got a number to aim for with regard to total reduction.

Cheers,

Brian
 
I've got one for sale if anybody is interested. PM me.

Not sure if I still have the cart; Summit racing high torque high-performance gear reduced starter, power cables, deep cycle battery & 3/4" drive.
 
Hi Doug , any idea where I could get some drawings for that starter system, including the fit up on the crank?
Regards Mike
 
Sure sounds good! Your racing against some big HP bikes from the era. Some of the bigger cc bikes get by you on the straights and you blow by them in the corners.
Great video, thanks for sharing!
 
Hmmm... no drawings Mike but I could take some better photos of it from different angles if that helps you out- I would have to take the cover off the starter so you could see the reduction gears...
One of the secrets is that the big nut on the end of the crank is very well 'rounded' off so that the socket can easily slip off as soon as the motor catches, you just give it a little tug and off it comes.
 
That might be one of those old racing car starters which were used in the fifties ?
 
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