Kawi2strokes.com Forum

Hey Chris,

I understand why to run 90 degs and why to run a 180 split. If you can hookup the power a 90 deg crank makes I'd run 90 deg. But on the other hand if traction is not good the 180 can be the difference. I to believe the TZ dirt track motors ran 180 degs for this reason. Did the road race TZ run 180 degs?

Don

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Don

All yamaha 4's, race and street, used 180 cranx. They gave KR a kill switch that dropped #3 cyl for "traction" on the dirt miler bike. They didn't monkey with crank phazing till the 90's when Honda came up with the big bang set up
which was a totally different and bizzare gig.

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1975 H1
1974 S1
Yamaha RZ350
...and a smelly Honda CB350-Four

^true.


but these were race bikes... street bike would do better with 90 degree phasing regarding driveability.

A six cylinder Jawa, probably from Hungary:

http://www.youtube.com/watch?v=VeA6LVfq ... r_embedded

looks like you have be a gymnast to reach the highway pegs
mark

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she will never be pretty but she is a fun ride.

73 KAWASAKI H1 (Sold).
82 YAMAHA RD350LC
2000 KAWI KDX200H
2001 Triumph TT600

Can ya say wiiiiiiddddddeeeee glide! Wow!

Don

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Don

hello guys am new here, First I dont know if am postin this at the right section if not can someone pick it up an chuck it back at me an give me a heads up ? So, I was checkin out the 4 / 5 cylinder set-up thats some good stuff out there. I had been on with one of these a few years back and then I got hung up with other stuff and work got in the way etc etc, anyways interesting to see a few of you guys on with these. one dilemma I had back then was the crank phasing and thats was I was googling when I got a link to here, so. heres where Im at,, I see one way is all cylinders firing independantly IE 1.2.4.3 / 1.2.3.4. / or in the way I was thinkin of goin with 2 cyls at a time IE 1.4 and then 2.3 I think I got that from an article I read way way back from the aforementioned simon whitelock ?? the way I thought it would have to be was 4 seperate sets points /condensers/coils for the 1.2.3.4 /1.2.4.3 and struggled how to get ma head round mounting all that hardware !! or go with the 1.4 / 2.3 and use two triggers /points etc and two dual output coils as both would spark at the same time but I see you talk about two units I think petronix (what and where do you get them are they the same as that accuspark stuff?) or similar and have them firing at 90 deg and two pick-ups at 180 deg runnin with two dual output coils is that for the 1.2.4.3 setup? you mention wasted spark ,is that ok in a two stroke. Id like to get back on with this maybe over the winter, well at least restart, so was hopeing maybe one of you guys could explain it to me or help with a wee wiring diagram or a link to some help thanx off to do some homework

An accessible place to look would be the RZ 500 Yamaha. They stuck with what they knew best and had the opposite corner cyls fire together using a pair of 180 deg cranks.I can't recall the specifics of the layout of the ignition but there is a member here with 3 such machines.

_________________
1975 H1
1974 S1
Yamaha RZ350
...and a smelly Honda CB350-Four

As I posted earlier, I think you will get into transmission problems. They are really light duty, and doubling the torque load would not be a good thing.

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

got a look at some of the yamaha sites and right enough they run two up two down do you reckon it will sound like a twin ? a kinda twin twin ?? a like the triple wailing howling screaming sounds an dont wanna lose that any way a had a wee look at m in sc and h2 chris are there any more photos about the site av not clocked as yet ? cheers 341