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H1, 1970 http://www.kawi2strokes.com/forum/viewtopic.php?f=13&t=11615 |
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Author: | 900SL [ Sat Feb 18, 2017 1:10 pm ] |
Post subject: | Re: H1, 1970 |
I don't have a correct centerstand for a 1970, the one which came with my bike, is from a a later version. And besides I don't intend to mount the centerstand anyway. But, the takeaway here, IMO is: Do you want a tire which gives you, say 10-15% more adherence , but when it loses grip a does that suddenly, or do you want a tire with maybe 15 less grip, but which starts slipping a bit sometime before it loses grip completely, and it that sense, kinda gives you a warning. Or can you have both ? Seems as the K81 / TT100 belongs in the first category... |
Author: | RODH2 [ Sat Feb 18, 2017 7:05 pm ] |
Post subject: | Re: H1, 1970 |
I am pretty sure any modern tyre will outperform anything you can do with a H1 Kawasaki. Back in the day we production raced a H1, and at the time, against all advice, we used Bridgestone and Yokohama tyres with a fair degree of success. I wouldn't be concerned about using any of the current tyre available. I won a couple of races on 1971 model Yokohama "World Tour" tyres, and those things were NOT "soft compound".....I am not sure they were even rubber!! |
Author: | Ja-Moo [ Sat Feb 18, 2017 7:14 pm ] |
Post subject: | Re: H1, 1970 |
One thing not taken into consideration, is riding style. The old style uppie-downie riding style ends up with a lot more lean angle that the more modern hanging off style. Which makes a very big difference in cornering traction and foot print. |
Author: | BazNSW [ Sun Feb 19, 2017 3:58 pm ] |
Post subject: | Re: H1, 1970 |
Just my 2 cents, the most impotant tyre is the front, so I've always put a race compound on the front for good grip and a touring/standard compound on the rear. |
Author: | 900SL [ Sun Feb 19, 2017 4:02 pm ] |
Post subject: | Re: H1, 1970 |
BazNSW wrote: Just my 2 cents, the most impotant tyre is the front, so I've always put a race compound on the front for good grip and a touring/standard compound on the rear. Good point, Baz, your'e right As i remember it, my trackday Ducati was set up that way too, regardless of whether I used Pirelli Dragon, Metzeler or Dunlop Sportmax |
Author: | Jim [ Sun Feb 19, 2017 4:05 pm ] |
Post subject: | Re: H1, 1970 |
I don't know Baz, that sounds like a possible recipe for a high side. If it works for you, no problem, it just came to mind that having less traction on the rear than the front could be a problem for some people (like me). |
Author: | 900SL [ Sun Feb 19, 2017 4:54 pm ] |
Post subject: | Re: H1, 1970 |
As described here http://www.kawi2strokes.com/forum/viewtopic.php?f=14&t=12436&p=124780#p124780 I was relieved to learn that petcock performance is sufficient: Luckily, I'm not doing this for a living, cuz' I would have starved to death Time to give the ignition system some attention: When I got the bike - back in 2007, it still had the original Diamond TU-29 coils. I've kept them of course, but I have bought 3 new ones, which are now fitted. The main components, except from coils, HT cords and caps, can be seen here: The wiring harness was in good condition, apart from the outher protection tube, which I of course renewed. Pretty ackward job! I Also renewed the contact breaker points and the condensers, which are in fact the same as on a H1B. Carbon brush and holder looked OK after a cleaning, and there was plenty of carbon left. Rotor was cleaned carefully, by hand and inspected. As it looked OK with no scars or broken wires (judging from a visual inspect only) it was re-fitted. The central cam actuating the 3 breaker points looked to be in very good condition for it's age. With a micrometer screw, I measeured the differences in diameter around the cam to be approx. 0.05 mm, so it will be slightly polished by hand, and then reused. The whole assembly looks very "busy": Some screws still in need of replacement. But apart from this, I'm ready to start doing the ignition timing for the very first time Luckily I've got this one to help me: + plus some audio device to indicate when points begings to open. But still a very tedious task, I guess |
Author: | BazNSW [ Sun Feb 19, 2017 9:12 pm ] |
Post subject: | Re: H1, 1970 |
That is some nice work mate |
Author: | 900SL [ Mon Feb 20, 2017 3:41 am ] |
Post subject: | Re: H1, 1970 |
Thanks Baz |
Author: | Ja-Moo [ Mon Feb 20, 2017 11:22 am ] |
Post subject: | Re: H1, 1970 |
BazNSW wrote: Just my 2 cents, the most impotant tyre is the front, so I've always put a race compound on the front for good grip and a touring/standard compound on the rear. I don't know about all race tires, but the Avon and Dunlop vintage racing tires require a warm up lap, and require racing speeds to get to a temp of good traction. Which is not really good on the street. Imho. I know when i was racing, I had to be judicial as the tires were a bit greasy until up to temp. |
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