Messages

bike is a dt250mx.
i agree, but i dont think drilling slightly for a roll pin is a soft fix, replacement bearings for certain cranks have a drilling and a roll pin in the outer race, so its a variation of that really.

nasty mess of that crankcase - ouch!

les

i think i have sussed it, bearing in mind (no pun intended) that the race is a reasonable fit on the shaft (light tapping with a soft hammer will put it on).
i have managed to drill a 2mm hole into the flywheel in the corner up against the shaft, and then dremel a small slot into the inner race that will fit over a roll pin in the drilled hole.

no more rotation and the pin cannot come out while the bearing is in place. might help someone else out in a similar situation.

thanks for all suggestions.
cheers
les.

another way, which i think is what i will try, is to touch a small weld "pip" on the crank up against the web and then dremel a small slot in the inner race so that it cannot rotate.

what could possibly go wrong

im wondering whether a hard solder run in there would hold it

npw were getting somewhere!!

Yeah, i know.

i was wondering if anyone had tried "roughing up" the crank, or drilling for a pin etc.
i was even thinking of applying some water locally and rusting it up a little!!

les.

m in sc,

i was thinking of using that as a last resort, problem is that they list an "oil resistant" variety and it is hugely expensive and makes me think that the 640 would not stand up to oil.

les.

Hi folks,

could i please have a consensus of opinion on stopping the inner race of a crank bearing from rotating on the shaft. the new bearing is reasonable fit but there are signs of rotation on the crankshaft (polishing of the surface) where the bearing sits.

any ideas that dont include buying another crankshaft would be great!

cheers
les.

me too, no link.

BlueR32

was great to catch up, thanks for calling in. its raining alright now!
i am currently selling two or three bikes to fund the next one. i will keep following yours, good luck with it.
might catch up with the brother for a spin sometime.
cheers
les.

socal250

what a shame you had to drill the lock, i thought that the whole yoke would have lifted up enough at the rear to allow the lock to disengage, wrong again!

cheers
les.

socal250,

that to me looks spot on angle wise, i measured 15mm center to center of the bolts. its a small allen key, a 5mm hole would give you wiggle room, but you could start smaller and see if you are on or not. in my estimation you should miss any internals of the fuel cap.

no need to change the lock if you get one of these!!!;-

https://www.ebay.co.uk/itm/334008279666?hash=item4dc471e272:g:gD0AAOSwP61gpx88&amdata=enc%3AAQAIAAAAwIfziARVmCh6O3xoEmsEryrfuwD9pJlRLFRcUESU1aAF5TtIbcC16Wcjg5AAq3Nen%2F4LTh38iAvclQeiqbrqS90u9WhyH4xX8TpMh3tR4EZ71dsfLpM%2BCvotNHS7RpmOM45TNHpe%2FmBn9LuWX3YTYr4IAGVnua1zk30V44rjFyXoEwQZhRvAOuwD3Dybkj%2BZo5YBPYVHolosVsd5%2BQxvSNc7cy4LXnPIuY%2Bu7cSS5sw8h%2FzMJb9iV%2Fa2Z4IIxPb46w%3D%3D%7Ctkp%3ABk9SR6zO39aiYg

let me know how it goes!
les.

Yup,  just checked on one of  mine. 45 degrees in and forward of the allen screw that is at about 4 or 5 oclock drill a 5mm hole 15mm away from said screw centre. that is, a hole thru the opening part of the fuel cap. the offending screw will be there (hopefully!).

les.

socal250,

guaging where that screw is in relation to the visible ones, i bet you could drill a hole just big enough to get an allen key thru there and have at it.

not much to lose!

cheers
les.

me again

here is a replica, in the 4th pic. you can see a small allen screw and the mounting hole is near the hinge part of the cap.

les.

https://www.ebay.co.uk/itm/184829670056?hash=item2b08b4f2a8:g:JrUAAOSwY09hgnuu&amdata=enc%3AAQAIAAAA4GZxeUeg07zF2BcCSUvu0zhabGwYeRvN1PCy77Pfz%2BGHScXZvkCrIxwdsLVUbYtv2hdVPBq4RX%2Bk7gfWzZQvUxnrB0qCMnHArNULZe06MkW50Bmz%2FhE702yygCnet0Rq6Sl2q6dLbg7XcCEysXwSm1q6YCsI6OsBcRhJY3E881EgkVDdy3Bb3zfgc5ddlaGhEYYnlBLoLOC8gjYmALM1xp4M7zu2bp2w7gEiBaPSZlNrU1dPwn61laZNCIYt7q4ZmlzM8UELINEWGvM5sQMokuLmjvRyhVEhdwmOx38mrT2O%7Ctkp%3ABFBM9Puvg6Ji