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About a gearbox


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Kubira

 
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1992 Honda MC21SE
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About a gearbox

Tue Nov 02, 2010 9:45 am » Post: #1 » Download Post

Hey
Need some info's on the composition of the transmission holder, mine brokeded, needs some supa glue Crying or Very sad

I plan on getting a nice couple of welds to hold it, once fitted and bolted up, it should be secure. We'll see wont we!

The strait spring leg was actually in behind the crack, which was making it jut out like it is. Looks like it has been there a while

pics included for your amusement
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2Smoke

 
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1987 Honda NSR250 MC16
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Tue Nov 02, 2010 12:12 pm » Post: #2 » Download Post

Ah yes, common problem! Had a couple like that myself..
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Andy
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1991 Honda NSR250 MC21
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Tue Nov 02, 2010 3:35 pm » Post: #3 » Download Post

They tend to crack when they are fitted into the cases incorrectly.
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Kubira

 
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1992 Honda MC21SE
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Wed Nov 03, 2010 6:11 am » Post: #4 » Download Post

Cheers for the info, now waiting for the tig to finnish..

Meanwhile, the sleeve i've hi-lited is included in part 3 ( E - 8 ) right? Seal set is on order, but im not too sure how to remove the sleeve, its kinda tight fitting..

any ideas appreciated
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Hermit

 
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Location: Paraparaumu, New Zealand
1992 Honda NSR250 MC21
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Wed Nov 03, 2010 9:20 am » Post: #5 » Download Post

yeah a fresh one comes with the new kit.

Its REAL tight in there, i used a combination of heating up the surrounding aluminium (dunno if that made it expand away from the sleeve thing, or clamp onto it tighter...) and thrashing it out with a well chosen drift. The thing is with the drifting it out plan is that you have to set the job up so that you can give it a f**king good smack and that all your hammer energy goes into the part you're trying to get out. If you're not working on a good solid bench top and don't have a way of keeping the clutch cover from jumping around when you hit it, then your life will be harder than it has to be. I started off tapping it like a girl because i wasn't sure how it was fixed into the clutch cover but once i was sure it was just a tight interference fit i gave it the brutality it deserved and out she popped.

To get the new one in, i actually put it in the freezer for half an hour to shrink it. When the time came, i heated up the clutch cover with my heat gun (a glorified hair drier if you've never used one), pulled the water pump sleeve thing out of the freezer and tapped it home with another well chosen drift. Whether the heating and cooling was worth the trouble i don't know but that whole carry on saw me to eventual success.
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Kubira

 
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Wed Nov 03, 2010 10:23 pm » Post: #6 » Download Post

*cracks knuckles* alrighty then.. cheers Hermit
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{.bLanK}GoD

 
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Thu Nov 04, 2010 11:00 am » Post: #7 » Download Post

Done my first NSR gearbox removal and reassemble last week, I noticed that spring leg interfering before I even put the bolts in.
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Kubira

 
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1992 Honda MC21SE
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Fri Nov 05, 2010 12:23 am » Post: #8 » Download Post

The sleeve in water pump was actually glued in , no wonder it needs a good belting Very Happy Box is back in, waiting for parts to arrive to refit the water pump. Made sure that lil spring leg is not intruding. Cool

picture of the weld here
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