Honda Spree and Elite 50 Forums

Well, my SA50 '89 made a horrible noise while I accelerated, ran fine home and then wouldn't start next time. Seems the outer pulley was loose and looking closer the splines on the crankshaft don't extend beyond the boss for the movable pulley. I guess the pulley worked loose and then stripped the splines good when I started it again.

I read another post where I think the guy just torqued down the nut with an impact and it worked ok which is going to be my first try. Will also put a second nut on to keep it on there as good as possible.

If that fails I guess I'll try to tighten it on good then put a few tack welds from the nut to the pulley and then from the nut to the shaft itself.

Hopefully method 1 will work though as I think that once it's started most of the pressure will be outward and not radial which would be more of starting and what the splines would be for.

Any suggestions?

Cheers,

CT

http://www.hondaspree.net/phpBB2/viewto ... crankshaft

out of focus picture to confuse you:

Time to try your idea or replace crank. It happened to my af05/se50 too.

Of course if method 2 doesn't work I'll be wondering how to get the crankshaft out with a welded-on pulley...

thombaugh wrote:Of course if method 2 doesn't work I'll be wondering how to get the crankshaft out with a welded-on pulley...

Cut it off? pulley kits are cheap.

i did this on my brand new crank!
i was upset. i changed out my variator weights like 10 times, and on the last one when i got it right i forgot to tighten the stupid thing.

there is a lock tight that is made for splines, then put an impact on it and get it good and tight.

ive had mine like that for over 10000 miles no problem.

Not sure if I get it, cf_z, did you save the crank after stripping it or did you have to get a new one?

The more I think about it the more I'm thinking it won't work unless I can torque it down enough to catch a little of the splines that are left. Then I also thought about shortening the boss that the variator rides on because there is more spline that's hidden behind that but I guess I'd need to find someone with some fancy machining tools for that.

CF stripped his splines too.

If you have access to an impact gun, I'd clean the surfaces and try an adhesive (epoxy or lock-tite type) between them. Then blast it on with an impact gun to hold it together.

Welding's another option but I'd try the above first. You could spot weld the nut to the ring, and then the nut to shaft (if needed,) but it will require a grinder to take apart later.

Well so far so good. Put some loctite on there and used the impact and so far it's working. I'll give it 50 miles or so before I'll say it's 'fixed'... Thanks for ideas everyone.

I would braze or weld the nut to the outer pully face apply loctite and spin on .

It's still going well after a couple of weeks so seems it will run without the splines. I won't be surprised if it comes loose again but I'll just do the locktite & impact thing again a few times before dragging out the welder...