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Discussion in 'Hacks' started by High Octane, Jul 8, 2015.
Well there’s more to come. We’ll just see if anything good comes from this.
Now it all starting to make sense. And FWIW a double row spherical roller bearing is fine with any amount of misalignment as long as the balls are staying within the outer race. There is no advantage in making sure they are aligned.
Throttle bodies getting the old what for.
Good plan and they will smell better also, the air bleeds always seem to clog with carbon and crap, everytime you balance them it helps to remove the lrg brass air bleed screw and give them a blast of carb cleaner and compressed air.
I was going to knock out this dent and then get the header ceramic coated. But it looks like there’s a restriction right in the way of by dent knocker outer. So I guess it’s either a eBay header pipe or live with a dent.
$100 shipped. Came off a bike with only 12,000 miles.
Courtesy of your favorite eBay shopper.
Keep the dent. Remove the restrictor. Not sure where this is? Can you point it out on the bike with the exhaust installed?
I think that's in the crossover pipe between the left and right headers.
The underside of the crossover pipe on the right side of the bike( left in the pic). I doubt if it’s a performance issue. Just don’t know if I want to pay to have a dented pipe ceramic coated.
$100 here $100 there, pretty soon your talking real billions.
That restriction reminds me of a scooter a nephew of mine had as a young fella.
Chinese made 50cc two stroke.
50kph top speed.
1st he drilled out the restriction in the exhaust.
Then the restricted air intake.
From about 12mm hole up to I think 16mm.
Any more defeated the purpose.
Up to 70kph now.
Then there were the spacers restricting the variable belt drive.
90 plus kph and scary as hell to ride with the puny drum brake and feeble suspension.
It had Yamaha written on the piston apparently so made to Japanese standards.
My powder coated / ceramic guy works in the family Exhaust Pros garage during the daytime. I bet he could fix it up / cut and weld in an end cheap. Maybe I’ll go to town (30 miles) and ask him.
Pistons? Did someone say pistons? What are these damn things doing here.
You could try the ole slide hammer trick. Drill a hole add a screw and see if you can hammer out the dent.
Or you could cut the pipe right near the dent to give you access to repair....then weld her back together. Easy....
Jack and Buck
My vote , is this a poll ? , is for plugs , compressed air and cherry red stainless.
Could work , could be an interesting experiment . Could be mildly dangerous.
I texted the pics to my powdercoater. He said his dad can fix it almost perfect before he ceramic coats it. I suspect he’ll cut, hammer, and weld it. I plan to take it to him tomorrow.
Ok that dent in the crossover is not problematic BMW put and wanted the restriction in the crossover leave it , this is about torque not HP.
If those pistons are from an RS,RT or S they are 11/1 vs GS 10.4/1 and will give you great low end.
I’ll do some more measurements but so far they appear exactly the same. Maybe I already have RT pistons. Is there a specific year RT or RS to use. Gspot hasn’t been much help yet.
All RT RS S used same piston and cam , GS and R a different piston and cam. on the 11/1 models the center is raised a bit.
GS and R flat top
It's the small things and the lack of any easy alternatives and they are well made Mahle pistons.
The RT pistons I bought do not look like that. They are flat top. I wonder if there are multiple RT piston designs.
My GS piston on the left, my new “RT” piston on the right.