jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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Post by jyrgnorway on Dec 20, 2014 14:54:00 GMT -5
I think that the H1 and H2 diameters of the clutch basket are the same size which does not seem right. The H1 has a higher primary reduction ratio, so the torque on the clutch isn't as different as it seems like it should be at first thought. The H2 clutch rotates 28% faster than an H1 at same rpm. That's why they can have about same size and design, still the H2 clutch takes a lot more torque from motor before the clutch slips.
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Post by papagriff on Dec 20, 2014 16:49:04 GMT -5
I thought the ratio was the other way around. not sure. When I went to put the basket on my H2 I found out the one I got was for an H1 and panic set in. I was always curious if the center distance was the same on the cases between the H1 and H2?
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Post by Jim on Dec 20, 2014 17:29:32 GMT -5
The center-center distance might just be the same, I'm not sure, but as Jorgen and I said, the H1 has a higher reduction ratio. The H1's is 1 : 2.41 and the H2's is 1 : 1.88. The faster spinning clutch of the H2 is probably why the H2 clutch has the retainer ring on the fingers.
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Post by papagriff on Dec 20, 2014 21:49:07 GMT -5
was told the early h2 did not have the ring on the fingers. I have baskets for h1's with and without the rings.
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Post by Jim on Dec 21, 2014 0:20:54 GMT -5
I have a 4,300 serial number late 1971 H2 and it has the ring. If early ones didn't, they must be earlier than that. Maybe someone else will comment, but I would have said that no H1s came with the ring.
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jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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Post by jyrgnorway on Dec 21, 2014 5:23:19 GMT -5
was told the early h2 did not have the ring on the fingers. I have baskets for h1's with and without the rings. May you please post a picture of the H1 clutch with the ring? I have never seen it, but the Japanese drunk so much sake on the factory those days, so everything is possible. Here in Norway, we have a stock H2 serial number 00055, engine mumber 52 I think. As far as I know, the ring is present at that bike. But as said, you never know. They did some strange things back then
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Post by papagriff on Dec 21, 2014 18:14:13 GMT -5
will try to get a picture. have better luck with emails than posting on this site. have other project pictures to post though. paul gast told me about cutting for a ring but maybe he meant the h1. last week he was looking for an h2 basket, thought I had spares but they were both h1. one cut for a ring.
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Post by speedgeeza on Dec 22, 2014 21:02:53 GMT -5
I have a 300 Gasgas trials bike for which I was recommended to use ATF in the trans. This gearbox has just four sets of gears, but six speeds due to the use of dog rings. It also has a diaphragm clutch. With less than thirty five hours use from new, the engine was making a hell of a racket. Upon opening it up, every bearing including the mainshaft twin rollers and crankshaft twin race mains (yes, they are lubricated by the trans oil) were in a dreadful state. Infact, the mainshaft bearings were so bad, they were acting like a sprag clutch and would only allow the shaft to spin CCW. This was a very expensive fix as the OEM parts were rediculously priced. First and last time I'll use ATF in such an application. 80w in both my H2's.
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Post by rocket on Aug 18, 2015 21:59:56 GMT -5
Just an update . Honda no longer makes or distributes the HP 2 Stroke Transmission racing oil 80/85 anymore so it's back to Belray I guess for me ...
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Post by H2 Dude on Aug 18, 2015 23:21:28 GMT -5
I stopped using Belray because of the price increase now at $20 L I'm back to basic 10W30 motor oil. and 20W50 for the GT 750..Many GT owners have been using 20W50 for eons with no issues. My h2 won't even slip under full throttle..cheap oil works for me.
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Post by Walms on Aug 19, 2015 4:57:15 GMT -5
I bought the expensive gear oil last summer and had slippage, this summer I added a couple extra plates to my clutch and I'm running Motormaster gear lube and all is good. My opinion it's better to improve it mechanically than the hope for a liquid miracle.
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Post by Curtis on Aug 19, 2015 5:27:47 GMT -5
For anyone going to Mosport this weekend, I have on sale Spectro Gold Racing gear oil at the shop.
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Post by shiloh on Aug 19, 2015 7:29:21 GMT -5
I also use the motomaster gear lube, have been since the 80s, in all the triples i've owned, its inexpensive and it works.
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Post by klx411 on Aug 21, 2015 21:33:01 GMT -5
Not a triple but I used ATF in the gearbox of my KTM enduro bike with never an issue. I was always told that Type F ATF was the best but I didn't have any issues with the Mercon/Dextron either.
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Post by Lou on Aug 22, 2015 0:27:05 GMT -5
If you read all the data (like biker don has tried to say for years) only F will support bearing life. Our 1948 Ohio boring Mill runs two electric clutches and torque to the moon...type F automatic transmission fluid only.
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