collapse

www.dimecitycycles.com


www.restocycle.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.bisonmotorsports.com

www.speedmotoco.com

www.cognitomoto.com

www.townmoto.com

www.sparckmoto.com

www.Moto-Madness.com

www.pistonsociety.com

www.steeltowngarage.com

QUESTIONS ABOUT THE SITE? TROUBLE REGISTERING? ADMIN@DOTHETON.COM

Author Topic: Yet another SR250 Tracker UK Build  (Read 11061 times)

Offline vortexracing

  • Posts: 38
Yet another SR250 Tracker UK Build
« on: Dec 15, 2014, 17:38:24 »
Well I picked this little thing up for £300 with a full years MOT and 6 months tax.


Untitled by eastham_david, on Flickr


was a bit oily, looked like it had never been cleaned

P1050488 by eastham_david, on Flickr

My biggest concern was this exhaust stud was loose, looks like a heli-coil is called for and a new stud.

P1050492 by eastham_david, on Flickr

Stripped it down so far to this and started to try and clean the years worth of chain lube off the rear wheel.

P1050497 by eastham_david, on Flickr

Got the inspiration form the Autofabrica SR250 and the Orange 'Mexico' one off here that SteveG posted.

Hopefully it will turn out similar to those.












Offline pigp3n

  • Posts: 25
Re: Yet another SR250 Tracker UK Build
« Reply #1 on: Dec 17, 2014, 21:56:03 »
cool post up lots of pics especially your take on how to change the seat.

Offline vortexracing

  • Posts: 38
Re: Yet another SR250 Tracker UK Build
« Reply #2 on: Dec 28, 2014, 15:31:15 »
Wiring loom removed, and next the motor.

20141226_202233 by eastham_david, on Flickr

Whoever had the bike before me must have never cleaned around the front sprocket area, it's got 1/2 inch thick of oil and chain lube on it.

20141226_204845 by eastham_david, on Flickr


While I'm posting on here, how easy/difficult is it to reduce the fork length/travel. If I go with std fitting bars rather than clip-ons, I can only drop the forks by about an inch, before they interfere with the handlebars.

I may just be able to get the tank and fwd portion of the seat on an horizontal level, but I may have to resort to lowering the forks. The other option is to drop them a lot further in the clamps and fit clip-ons.

advice on the fork lowering would be much appreciated.

Ta

Dave 

Offline vortexracing

  • Posts: 38
Re: Yet another SR250 Tracker UK Build
« Reply #3 on: Feb 20, 2015, 15:24:07 »
I'm after a bit of help please?


Just come back from the workshop who will be aquablasting the cyclinder head and barrel and he says it will be much better if I can remove the valves, cam and followers.


I can see that the follower pins are installed from one end only, and have a threaded (M6) hole in them, but can some body tell me the best way the remove them so I can get the followers out of the head please?

Thanks in advance

Dave

Offline cosworth

  • Posts: 561
Re: Yet another SR250 Tracker UK Build
« Reply #4 on: Feb 21, 2015, 23:26:04 »
The forks are easily lowered. Pm me.
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: 38
Re: Yet another SR250 Tracker UK Build
« Reply #5 on: Feb 22, 2015, 05:42:44 »
PM'd   :)

Ta

Offline hillsy

  • Posts: 4106
Re: Yet another SR250 Tracker UK Build
« Reply #6 on: Feb 22, 2015, 07:39:56 »
I'm after a bit of help please?


Just come back from the workshop who will be aquablasting the cyclinder head and barrel and he says it will be much better if I can remove the valves, cam and followers.


I can see that the follower pins are installed from one end only, and have a threaded (M6) hole in them, but can some body tell me the best way the remove them so I can get the followers out of the head please?

Thanks in advance

Dave






You need to use a slide hammer to remove them. M6 bolts in the pins and "knock" them out with the slide hammer.

Offline zap2504

  • Posts: 346
Re: Yet another SR250 Tracker UK Build
« Reply #7 on: Feb 22, 2015, 13:04:56 »
I may just be able to get the tank and fwd portion of the seat on an horizontal level, but I may have to resort to lowering the forks. The other option is to drop them a lot further in the clamps and fit clip-ons.
What I've done with mine (so far) is to use 13" shocks (originally for an XS650) and a spacer block to raise the rear of the tank so it is horizontal. The seat I'm currently working with (a XR tracker knock-off) will then be mounted horizontally with the tank. I did not want to make any permanent changes in case a future owner wanted to restore it back, so I did not change the front forks nor did I want to reduce front suspension travel - but depending on what I see I might raise them slightly in the triples.

Offline vortexracing

  • Posts: 38
Re: Yet another SR250 Tracker UK Build
« Reply #8 on: Feb 22, 2015, 13:12:07 »
Sorted !!!

Thanks , had a good think over a couple of beers last night, and decided to have a go at making a pulley. I don't have a small slide hammer.

3mm thick steel strip with a 6mm hole in it and 4 different lengths of 6mm bolts and they both came out easily in the end.   :)

Didn't even need to heat them up 

20150222_163029 by eastham_david, on Flickr

My next thought was about the cam  ???

But a quick pull and wiggle and the whole lot came out. It only left the roller bearing in the far end.

20150222_165013 by eastham_david, on Flickr

I'll pop into the aquablasters this week and see if he thinks that will be OK left in, I don't fancy trying to get that out   :o

I suppose I could always try and mask it in some way, just to keep the abrasive stuff out as much as possible.

Has anybody removed that inset bearing and re-fitted one, if so how did you do it.?

Anyway, all out and ready to go except that bearing and I need to find somebody with a small spring compressor then the Valves can come out.

20150222_165033 by eastham_david, on Flickr

Here is the offending stud that needs a clean and re-weld, then tapping, the previous owner must have known it was blowing, the whole area is black around the exhaust port.

20150222_164940 by eastham_david, on Flickr

Head and Piston/barrel  look good, the motor looks like it's in really good condition, apart from that stud.    ::)

20150222_164946 by eastham_david, on Flickr

20150222_165001 by eastham_david, on Flickr


Lastly, I'm assuming those pivot pins will need new o rings? am I correct?


Thanks for your help , it's really appreciated. 

Quote
What I've done with mine (so far) is to use 13" shocks (originally for an XS650) and a spacer block to raise the rear of the tank so it is horizontal. The seat I'm currently working with (a XR tracker knock-off) will then be mounted horizontally with the tank. I did not want to make any permanent changes in case a future owner wanted to restore it back, so I did not change the front forks nor did I want to reduce front suspension travel - but depending on what I see I might raise them slightly in the triples.

I'm looking to lower the front mounts on the frame as well as maybe lift the rear of the tank. Re-sale is not on my agenda at all.


Cheers

Dave
« Last Edit: Feb 22, 2015, 13:16:10 by vortexracing »

Offline zap2504

  • Posts: 346
Re: Yet another SR250 Tracker UK Build
« Reply #9 on: Feb 22, 2015, 13:36:24 »
I'm looking to lower the front mounts on the frame as well as maybe lift the rear of the tank. Re-sale is not on my agenda at all.
Understood - but if you are doing a "tracker" (as opposed to a "cafe racer") you would want to work toward a more upright seating position (e.g., higher/flatter handlebars - I'm planning on using ones from a KLR650; higher/flatter seat) with as much suspension travel (for rougher roads) as possible. Lowering the front suspension and using clip-ons will reduce suspension travel and create a more "crouched" riding position.