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Author Topic: Yet another SR250 Tracker UK Build  (Read 11223 times)

Offline Spudscustoms

  • Posts: 8
Re: Yet another SR250 Tracker UK Build
« Reply #40 on: May 18, 2015, 18:29:19 »
Have a look at these and see what you think

http://www.classicbikeshop.co.uk/frame-chassis-mudguards/mudguards.html

could they be cut to size then skotched to the dull finish your after??

Offline vortexracing

  • Posts: 39
Re: Yet another SR250 Tracker UK Build
« Reply #41 on: Nov 23, 2015, 16:30:04 »
Well summers over and building is back underway.

It's been a few months as I have been waiting for the  cylinder head to be welded (the exhaust studs had gone loose and stripped). Anyway after months of waiting it's done    :)

Untitled by eastham_david, on Flickr


and whilst waiting, I have been looking for some side panels, I have tried all sorts including XS650/400, even SR500 ones non fitted and I thought I was going to have to have some made, until I came across these at a local breakers. Suzuki GN125 panels. They fit perfectly.    8)

 They need some attachments fabricating and then we are in business.

I priced up a lightweight, dry battery and they are £100 ($165 !!) so I opted for these panels so I could use the standard lead acid batteries that are considerably cheaper (£25)


Untitled by eastham_david, on Flickr


Only other awkward thing is trying to get the camshaft bearing out. It's full of media from the aquablasting and it needs replacing. Being a blind bearing (only accessible form 1 side)  it's proving very stubborn, even with heat applied to the outside of the head.

any suggestions?

Offline dualero

  • Posts: 217
Re: Yet another SR250 Tracker UK Build
« Reply #42 on: Nov 25, 2015, 10:49:18 »



Only other awkward thing is trying to get the camshaft bearing out. It's full of media from the aquablasting and it needs replacing. Being a blind bearing (only accessible form 1 side)  it's proving very stubborn, even with heat applied to the outside of the head.

any suggestions?

Maybe try the kitchen oven to try to expand the head completely. I've seen cylinders and bearing drop from Paris only putting them in the oven. I'd suggest 300F for about 30min at least

Offline zap2504

  • Posts: 346
Re: Yet another SR250 Tracker UK Build
« Reply #43 on: Nov 25, 2015, 13:39:53 »
Not done it myself but I have read where you can fill the space between the bearing and cover with grease, then use a drift the same size as the center bore to create hydraulic pressure to pop blind bearings out.

Offline cosworth

  • Posts: 561
Re: Yet another SR250 Tracker UK Build
« Reply #44 on: Nov 25, 2015, 15:02:05 »
Not done it myself but I have read where you can fill the space between the bearing and cover with grease, then use a drift the same size as the center bore to create hydraulic pressure to pop blind bearings out.

This is how I did it. I had a chunk of round stock brass the exact size for it. Messy, but it worked.
1981 SR250 café hot rod (sold)
1976 XS360 collector plates
1980 XS400 (on the bench)
1981 XS400 (in pieces)
2017 Husqvarna 701 enduro
Livin' the dream in western Canuckistan

Offline vortexracing

  • Posts: 39
Re: Yet another SR250 Tracker UK Build
« Reply #45 on: Nov 26, 2015, 18:21:26 »
Cheers guys I'll have a go, the only problem I see with using the oven is I don't want the valve guides coming out as well   ::)

Offline cosworth

  • Posts: 561
Re: Yet another SR250 Tracker UK Build
« Reply #46 on: Nov 26, 2015, 19:39:29 »
That was my thinking. As much as they are pressed in...
1981 SR250 café hot rod (sold)
1976 XS360 collector plates
1980 XS400 (on the bench)
1981 XS400 (in pieces)
2017 Husqvarna 701 enduro
Livin' the dream in western Canuckistan

Offline dualero

  • Posts: 217
Re: Yet another SR250 Tracker UK Build
« Reply #47 on: Nov 27, 2015, 06:31:51 »
This is how I did it. I had a chunk of round stock brass the exact size for it. Messy, but it worked.
I've heard of this technique for removing stubborn pilot bearings from car/truck flywheels, another tip I can add is that if the rod you have is not that tight on the center bore, instead of using only grease, use small strips of old rag covered in grease through the center bore, with the rod and a hammer. If it fills up, get another piece of rag and stuff it in there till the bearing is out


Offline vortexracing

  • Posts: 39
Re: Yet another SR250 Tracker UK Build
« Reply #49 on: Apr 06, 2016, 18:21:59 »
Yip, a bit slow though, Bearing out and new one in  :)

GN250 side panels, and tabs for the panels, fitted over Easter. Tank Lifted, front bobbins lowered & Battery box next on the list.

Please ignore the crap welding, it's just me tacking the stuff into place, off to a mates who will be doing a much better job.

Standard rear mudguard fitted but moved forward, and this allows for the plastic liner to still fit in front of it.

IMG_2567 by eastham_david, on Flickr

IMG_2564 by eastham_david, on Flickr

IMG_0173 by eastham_david, on Flickr

IMG_7642 by eastham_david, on Flickr

IMG_7644 by eastham_david, on Flickr
« Last Edit: Apr 16, 2017, 15:50:02 by vortexracing »