F650GS BMW motorcycle top end rebuild. F650GS timing
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- čas přidán 30. 12. 2022
- In this video i complete the BMW F650GS engine rebuild
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Setting shims video link - • Dirt bike shims settin... - Auta a dopravní prostředky
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Thank you
Very good video
Thanks
Hello, great video! İm trying to put the cams back in place after doing a shim change however the cam chain was extremely tight to begin with and now i cant put it back in place (ive got 4 zipties on it) im going to remove the zipties and realign the cams buny question is this: does the chain have to be tight on the front side of the engine when aligning the cam sprockets? And how much slack should there be in between the sprockets (there was 0 slack when i took it apart) thank you!
have you taken the cam chain tensioner out? if you take it out you should have enough slack
Informative video chap, how many miles on the bmw? was it your own bike?
I'm not sure on the miles sorry
The guy I bought it off swapped it out as the output shaft was ruined
I have a 2013 BMW G650GS which I think is similar but made in China rather than Germany. Love the fuel economy and ability to carry a decent load of luggage - but the vibrations at 4k RPM are absolutely horrible. Is that normal or could I have an output shaft or counterbalance issue?
Hi
I don't have any experience with that model but that amount of vibration isn't normal
If it's at a standstill then it could be an internal engine bearing
I have a issue with the piston, mine don't have a sign or something that make me know the front or the back of it. How do you know the right direction of the piston?
It should always have an arrow on it when it's new. you can however look at the cut-outs for the valves. bigger cut-out in the piston goes with the bigger valves. the intake valves are normally the biggest so the bigger cut-outs go to the back
@motorcyclefixer This piston doesn't have valve marks, only have the size of the piston (B and 99,98)
Do you have a video explaining how to set the crank to TDC?
Yes I cover it in one of the videos
I believe it's the bottom end rebuild video.
Basically you need to turn the crank until its at top dead centre.
Use a long ball ended Allen key in the spark plug hole then there is a small bolt on the side of the bottom casing that you remove and put a pointed grub screw in the hole which locks the crank at top dead centre
How do you know if it’s in compression TDC or exhaust TDC or it doesn’t matter?
@@mrsvetly it depends what you're doing but if the valves are closed it's the compression stroke
If you're setting the timing and you have the cam chain off then it doesn't matter because you'll set the valves closed
The spark fires on both strokes
@@motorcyclefixer i am asking because I was trying to check the valves and forgot to put the bike in TDC and the chain tensioner so when I turned the engine the chain skipped and the cams rotated so I had no idea where was I. But I put a screw driver through the spark plug hole on cyl 1 to try and find TDC and stopped when it stopped moving up, so I thought I was in TDC. But when I started the engine after reassembly it was making all those clapping noises and I shut it off immediately. You think I bent any valves/pistons? Any idea why my plan didn’t work?
@@mrsvetly I think the best thing to do is to get your hands on a manual and work through it.
It's hard to diagnose it without looking at it tbh if you've done it correctly and there's still a mouse though then it'll be something else
Maybe a big end bearing or something else
Have you checked the valve clearances