Airbox Repair

[ryonker]

The airbox on my 78 750 has at least on of the boots that doesn't seal well against the box (it spins, and you can see light through a small gap). Has anyone fixed one these?

I have some ideas but I thought I would probe smarter minds. I did search for a while but came up with nothing. If there is a relevant thread you know of that would be great!

Thanks!

Rick

[rapidray]

You can use black RTV silicone on the inside of the box to seal them. If they are getting hard it's time to replace them. If they are still pliable, the silicone will work. Ray.

[Dan Ruddock]

Some silicon sealant would do the trick. One thing I have noticed on these old air boxes is they are plugging up with rust on the crankcase vent hose fitting. I just blow through the fitting and it should pass the air easily. If not use some compressed air and piano wire to clear the passages. The crankcase pressure must be released or oil leaks will develop. Did you get that muffler I sent you yet. Dan

[ryonker]

Thanks for the responses!

Yes, the boots are still really pliable. So do I just reach inside and put a bead around the back wall of the box where the boot goes in?

Rick

[ryonker]

Some silicon sealant would do the trick. One thing I have noticed on these old air boxes is they are plugging up with rust on the crankcase vent hose fitting. I just blow through the fitting and it should pass the air easily. If not use some compressed air and piano wire to clear the passages. The crankcase pressure must be released or oil leaks will develop. Did you get that muffler I sent you yet. Dan

Yes, got the muffler. Thanks Dan!

It cleaned up real nice (elbow grease/sos pads and some rust remover). I just got done dipping/cleaning the carbs and popped them back on. Put the pipes and mufflers back. She fired right up and sounds great! When I bought the bike about a month ago, cylinder #3 wasn't working (pipe was cool). After the carb clean (o-rings, etc), #3 got super hot! It's always fun when things go right!

Now, I need to fix the airbox--oh, and do the valve clearances!