How bad is too bad?
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| Shift fork wear http://www.kawi2strokes.com/forum/viewtopic.php?f=2&t=11573 |
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| Author: | kawboy [ Mon Apr 04, 2016 2:16 pm ] |
| Post subject: | Shift fork wear |
How bad is too bad? |
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| Author: | kawboy [ Mon Apr 04, 2016 2:17 pm ] |
| Post subject: | Re: Shift for wear |
The upper fork is in pretty nice shape 
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| Author: | Ja-Moo [ Mon Apr 04, 2016 6:16 pm ] |
| Post subject: | Re: Shift fork wear |
If you can feel any kind of grooving, then it needs to be replace. heat discoloration hasn't been a problem. |
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| Author: | kawboy [ Mon Apr 04, 2016 8:40 pm ] |
| Post subject: | Re: Shift fork wear |
Good deal. I can probably get away with replacing one lower fork then. The discolored one isn't really worn very much. The other lower is worn pretty deep. |
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| Author: | redcloud1 [ Thu Jul 20, 2017 7:17 am ] |
| Post subject: | Re: Shift fork wear |
Ja-Moo wrote: If you can feel any kind of grooving, then it needs to be replace. heat discoloration hasn't been a problem. Not trying to hijack this thread but was going to post up the exact subject and found this thread...attached is a pic of my forks...the one closest to my depth gage appears to have the most wear...as shown, the wear pattern is only .009" deep... Are these at all servicable in that I have access to a surface grinder...can I redress the surfaces that have the wear marks? Are there service limits? Though I do have very minor wear/grooving, is .010 going to break the bank in order to clean them up? |
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| Author: | Ja-Moo [ Thu Jul 20, 2017 8:44 am ] |
| Post subject: | Re: Shift fork wear |
As I posted , if you can feel a groove, it's done for in my book. I think someone does refurbishing now, not sure who though. |
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| Author: | redcloud1 [ Thu Jul 20, 2017 9:42 am ] |
| Post subject: | Re: Shift fork wear |
Ja-Moo wrote: As I posted , if you can feel a groove, it's done for in my book. I think someone does refurbishing now, not sure who though. I sort of figured--I was only asking because it is less than .010". In order to do a weld build up, it would most likely require a preheat 250 to 400, and a TIG process utilizing high nickel wire...and then and extremely controlled cool down period with jackets or heated sand...then of course the grinding to finish. From all of the reading I've done these forks seem to be one of the weak points of this tranny. Has there ever been a group buy affording some discount? Looks like I'll be in the market soon  I might look to try and repair them myself. |
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| Author: | Jim [ Thu Jul 20, 2017 10:06 am ] |
| Post subject: | Re: Shift fork wear |
John, he was asking about grinding them about 0.010" to get rid of the roughness, not whether he can use them as-is. I'd think that would work great, but I have little transmission experience, so my opinion might not be worth much. |
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| Author: | BarryB [ Thu Jul 20, 2017 10:18 am ] |
| Post subject: | Re: Shift fork wear |
A couple of vendors sell new ones for H1 and H2 (so far as a set). Little pricey but if ya need'em ---- buy'em. Diablo for example says: "New shift forks ...... common problem and well known weakness of the H1 and H2 triples is the transmission shift forks. Very high quality remanufactured using the latest in metallurgical advancements". |
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| Author: | redcloud1 [ Thu Jul 20, 2017 10:56 am ] |
| Post subject: | Re: Shift fork wear |
BarryB wrote: A couple of vendors sell new ones for H1 and H2 (so far as a set). Little pricey but if ya need'em ---- buy'em. Diablo for example says: "New shift forks ...... common problem and well known weakness of the H1 and H2 triples is the transmission shift forks. Very high quality remanufactured using the latest in metallurgical advancements". I saw those Barry--I appreciate the nudge and vendor info...ultimately If I have to hemmorage the money I would probably go with Diablo  ideally they would live on forever given routine maintenance, etc...what are some of the primary causes for grooving and the wear patterns to develop?Improper or lack of shimming? Rough finish on the gear faces that could be cleaned up? Thrashing? 
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