Squealing noise from front of engine

[Twag]

I purchased a 1986 1200 aspencade. It didn't run when I got it. Cleaned the carburetors and gas tank. New fuel filter. Had to replace the pulse generators and one ignition coil was bad. Also installed new timing belts. Started up and seems to run good ( still have to tune the carburetors). But when I was on a test drive the engine had a squeal at idle after it warmed up. I don't know what the noise could be. Does anyone have any ideas as to what the noise could be. Thanks.



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[Ohara]

If it wasn’t squealing before, your belts could be too tight. Once it is warmed up again and makes this noise, feel the timing belt covers they should not be hot. Good luck with this.

[julimike54]

Timing belt idler(s). Try running it more, mine got quieter after about 200 miles. The other way is to replace them.

[Twag]

Hi everyone, thanks for the replies. I did check the tension of the belts and they were probably a little tight so I loosened the tension a bit. I put the bike to top dead center with the T1 mark and set the tension to about 3/16". The manual said 1/8" to 3/16". It actually stated in the manual that if the belts were too tight the belts would whine. I started the bike and it was quiet, but the bike was cold. The noise didn't happen yesterday unit after a short test drive and the bike warmed up. I think I will change the the tensioner pully's this winter as well. They are the originals. I see a couple of DIY threads on changing the tensioners.

[DiscoLew]

I’ve just had exactly the same issue with mine. Slacked the RH belt tension from 3mm to 4mm - problem solved! Good luck with yours.