Yamaha SR250 - general engine questions and problems :)

[porcelanowy]

Hello
Is there any aftermarket option for full exhaust or only header for Yamaha SR250?
I have messed up the original and I am looking for something that will pass the MOT
I know about Jadus – probably the best option performance wise, but my budget will not handle the price aaaand is currently out of stock.
IXIL had something but it is discontinued long time ago.
Any chinese copy on aliexpress or something?
HELP!
Thakn you

 

[Maritime]

Try Webike out of japan,. they have lots of aftermarket for smaller displacement bikes and they are a site sponsor too I think so you can find the link here.

 

[porcelanowy]

Hello
Thank you for the clue - nothing in stock, but I will be monitoring the site.

Another issue: practically all screws in my engine covers have mixed or scratched heads (JIS standard).
I am thinking about buying a set of stainless screws for this particular model.
Found some options:
https://www.mikesxs.net/bolt-set-sr250-exciter-80-82.html
and ebay:
https://www.ebay.com/itm/372528441360
I will probably choose ebay, postage from mikesxs will kill me

Any thoughts about this subject?
Pros, cons, choose another source or option?
Thank you for your help

 

[pidjones]

SS is bad about gauling in aluminum. Make sure you lubricate with anti-sieze and don't over-tighten. I sugget screwdriver-type handles to tighten case screws.

 

[Maritime]

+1 lots of never - seize on the SS and don't over tighten or you can crack the cases and or the covers. Other than that it's a good thing to change out the JIS stripped heads.

 

[porcelanowy]

Hello
Thank you, will have this on my mind.
I am planning also to change the idle screw for one i can operate without a screwdriver (also ss).

Plus a small project: 3D printed air filter that looks like a velocity stack.
A prototype:

But this is another storry

 

[JerryAssburger]

Hello
Thank you, will have this on my mind.
I am planning also to change the idle screw for one i can operate without a screwdriver (also ss).

Plus a small project: 3D printed air filter that looks like a velocity stack.
A prototype:

But this is another storry

NEAT!