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Post by BritPete on Mar 3, 2024 13:17:25 GMT
so came to set the tappets and hit a snag, the engine would only turn over so far, I'd guess I had about 270 degrees of movement. head scratching time. I couldnt see anything wrong inside with a torch but there was no way I was going to force the engine to turn over, so back apart and investigate. it turns out the (presumably brazilian made) front balance shaft has more eccentricity ie a bigger lobe than the japanese ones, very careful setting and adjustment got the engine turning over nicely. the thing is though I'v never had this problem with a japanese engine, so brazilian shaft out and japanese one in. that should cure it. Could they be a different weight?
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Post by duffer on Mar 3, 2024 13:31:38 GMT
As I said on my own thread, Muppetry, that is not !. Trying to bleed brakes that lack cylinders, is !
I win 🏆😎
Perhaps this is not a good thing 😕
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Post by buster on Mar 3, 2024 17:03:55 GMT
so came to set the tappets and hit a snag, the engine would only turn over so far, I'd guess I had about 270 degrees of movement. head scratching time. I couldnt see anything wrong inside with a torch but there was no way I was going to force the engine to turn over, so back apart and investigate. it turns out the (presumably brazilian made) front balance shaft has more eccentricity ie a bigger lobe than the japanese ones, very careful setting and adjustment got the engine turning over nicely. the thing is though I'v never had this problem with a japanese engine, so brazilian shaft out and japanese one in. that should cure it. Could they be a different weight? no the weights are the same, you can actually see the difference in eccentricity between the two types of shaft. its like looking at a cam lobe
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Post by buster on Mar 3, 2024 17:04:15 GMT
As I said on my own thread, Muppetry, that is not !. Trying to bleed brakes that lack cylinders, is ! I win 🏆😎 Perhaps this is not a good thing 😕 fair enough
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Post by buster on Mar 3, 2024 17:14:40 GMT
got a bit sick of tripping over this on the kitchen floor, bit different now I'm living here. first job sort out a base gasket, I have a genuine 250 one that I'm not using so out with a marker pen and the scissors fits lovely hmmm, havent I been here before? get this right and the barrels just pat on with the palm of your hand not sure if its a quirk of these later engines but the cylinder head doesnt want to sit in place if the cam chain tensioner is lifted and nipped in place, I dont recall having this issue on earlier engines it now rotates freely and its making those lovely satisfying breathing noises now that the tappets are set, all in all I'm much happier and glad I took the time to swap out the balance shaft
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Post by buster on Mar 3, 2024 17:22:03 GMT
one last thing I did today was to dig out my box of copper washers and my box of o rings and then fit the external oil feed. a big thankyou to johnf for pointing out that theres a very specific way of doing it so that you dont twist the pipes in the cylinder head so first I fitted the external feed pipe with the banjo bolt into the upper crankcase just finger tight (blue ring) then with a new o ring and washers I fitted and tightened the bolt in red while holding the twin pipes in place with my other hand. then I tightened the two bolts inside the cylinder head and finally the banjo bolt (blue) this seemed to work pretty well without stressing anything or kinking pipes
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Post by BritPete on Mar 3, 2024 17:25:14 GMT
The 400 is 43hp what is the 450?
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Post by buster on Mar 3, 2024 17:32:33 GMT
The 400 is 43hp what is the 450? I think its quoted at 45, horsey powers all bloody nonsense anyway, torques what you want, its loads more fun and my ignition system delivers it in great big dollops. worth mentioning the classic japanese downhill spiral, in order to gain 2 horsey powers they had to add a rather weighty oil cooler...
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Post by buster on Mar 6, 2024 17:17:53 GMT
casings for this bike have been roughly polished with scotchbrite mops, I figured it was a good time to paint in the details. I'm still a thug at this job. first go, used a coat of primer and a top coat of gloss (same brand, done frames with them, no problems) and got a monumental paint reaction, wish I could buy paint stripper that was that efficient. second go, degrease carefully and start very carefully painting in the details with an artists brush, lose patience and get two good coats blathered on with runs and dribbles everywhere (far easier). leave them to dry and then rub them back with 320 wet and dry (used wet with a drop of washing up liquid) only I'm out of 320 so used 280 instead. not mint and perfect but ready for a final polish
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