Pinned So what have you done to your bike today?

Sold my $100 cruiser last week , so I needed a new bike , here is my new 92 zxr250c

 

They say good welds should look like a row of coins on their side , this guy just threw the whole bag of coins in

the joys of buying used bikes , 2011 cbr250r

 

Wow, what a pristine welding job. Give the man a prize!!!!!

 

Booger welding at its finest

 

That looks like they has the polarity wrong to me, nice to see that they tidied it up with the grinder

 

I've done that sort of welding, trying to patch rust holes in thin wall. You burn a bigger hole, so a weld 10,000 tacks is required. Or could replace it...

 

Picked up an abandoned mc22 project which is heading home with me.

just need some fairings and it will be back on the road , runs really well

 

Swap you for a running GSXR250

 

Why ?
Just scored a set of fairings off one of my customers for $200 , will have to sort out the tank colour

 

I pulled my crank apart yesterday and wondered which movie this monkey face is from:

 

I have a set of fairings if your interested

 

Why ?


Spent a bit of time sorting her out today, carbs cleaned , replaced a faulty rear chain adjuster , fitted new chain , fitted fairings she rides really well.

I won’t taker her home , I already have one , anyone what to buy an aus delivered mc22

 

Day 3 of trying to remove a cbr 250 MC19 cylinder liner, it still won't budge
I seems they were "cast in" while the upper crankcase was poured, with no visible "alloy ends, cast iron begins" on the bottom, I made a sort of boring bar to cut the over hanging alloy to enable access with a machined 6mm steel shouldered plug, cooked the top block 1/2 in the Kookaburra oven @ 400F for 1/2 hr, no movement, again, even with a few wallops with an attitude changer, just in case there was some alloy left under the shouldered plug.
Looks like it's time to cut up block #3 (with good std bores)

 

Weld it? Weld lines in the liner, the shrinkage might free it.

 

Another option might be heat the entire case then put dry ice pellets into the cylinders to try and create a larger temperature difference, or a combination with the welding and then heating followed by the dry ice pellets

I believe they liner may be similar in external surface to the ones pictured in this document on page 29 if they're encapsulated at the time of casting

https://cdn2.ms-motorservice.com/fi...itioning-of-Aluminium-Engine-Blocks_51708.pdf