Hunter's Atlas Started This Afternoon….

M1Lover · May 12, 2014

Pulled the single Mikuni off and went through it to clean out the crud and corrosion. Pretty sure I paid GP to do that…. But I digress.
Got the carb straight and reinstalled. With the tank and seat off, primary cover off (it leaked all its oil out) filled the carb with clean fuel and kicked the hell out of and it finally fired. Sounded pretty good too. First time I've been happy about that bike since I got it back from Texas.

Still to do: Lots of clean-up of wiring, hoses, cables and lines. Forks leaked all their fluid out, new front tire is flat due to tube being pinched during installation. Both exhaust flanges were loose. There's a chunk of threaded rod that was installed to hold on the pegs and seal the primary. Need to get the correct part for that. That won't be easy to install and should have been done properly the first time. Going to use RTV to seal the primary. Got to clean out the varnishy gas that was put in the tank and the bike ought to run. Wish me luck.

mikegray660 · May 15, 2014

Great hunter! - just need to continue to un-GP it and you'll have a good bike

best of luck!

m

M1Lover said:
Pulled the single Mikuni off and went through it to clean out the crud and corrosion. Pretty sure I paid GP to do that…. But I digress.
Got the carb straight and reinstalled. With the tank and seat off, primary cover off (it leaked all its oil out) filled the carb with clean fuel and kicked the hell out of and it finally fired. Sounded pretty good too. First time I've been happy about that bike since I got it back from Texas.

Still to do: Lots of clean-up of wiring, hoses, cables and lines. Forks leaked all their fluid out, new front tire is flat due to tube being pinched during installation. Both exhaust flanges were loose. There's a chunk of threaded rod that was installed to hold on the pegs and seal the primary. Need to get the correct part for that. That won't be easy to install and should have been done properly the first time. Going to use RTV to seal the primary. Got to clean out the varnishy gas that was put in the tank and the bike ought to run. Wish me luck.

Matt Spencer · May 17, 2014

They used to tip lard in the primary to seal them , as once overtightened it wond seal the seal . So a bed of silicone , more or less , may be necesarary to about half high F & R .
Or spotless Cleaning and pre coat BOTH mateing Surfaces so the seals do seal . ( both sides of belt AND both faces it mates to . ) .

M1Lover · May 19, 2014

Matt Spencer said:
They used to tip lard in the primary to seal them , as once overtightened it wond seal the seal . So a bed of silicone , more or less , may be necesarary to about half high F & R .
Or spotless Cleaning and pre coat BOTH mateing Surfaces so the seals do seal . ( both sides of belt AND both faces it mates to . ) .

Matt, thanks for the reply. I'll meticulously clean all seal surfaces and the gasket, then reassemble with a bead of RTV silicone in the appropriate locations. Then I'll allow it to cure for several days before adding the oil. Studying the design of the seal surfaces, its no surprise that the primary chain case frequently leaks. Just one more little thing about these bikes we love!
Cheers. H.

L.A.kevin · May 19, 2014

I find blue hylomar works better than RTV. The RTV tends to degrade and leak from parts expanding when hot. I switched to hylomar and much less leakage. Good luck.

Norton: rustproofing garage floors for over 100 years!

Kevin

texasSlick · May 19, 2014

+1 on the silicone gasket treatment. I suggest ATF rather than oil....lubes the chain adequately, less clutch slippage, and you will see red if it does leak. Oil leaks from somewhere else are usually blamed on the primary chain case, due to its "tinny" design. The red color will be specific. Do not over tighten the big nut....about one thread showing is sufficient....I know, that is hard to believe.

Using ATF allows you to back off on the 3 clutch spring tensions a wee bit....you will appreciate that as the Atlas clutch is a "bear". Venhill makes a teflon lined clutch cable that reduces clutch pull by about 25% should you find the pull too much.

Good luck with your Atlas!

Slick

I see Kevin has recommended Hylomar....have never used it, but just Googled it....looks like a good product....will get some!

Adrian1 · May 19, 2014

You'll certainly see red if it leaks slick.

texasSlick · May 19, 2014

Adrian1 said:
You'll certainly see red if it leaks slick.

That was a "double intended", Adrian....

PS: ATF does not turn the cush drive rubbers "gummy" as oil does.....another + for ATF over oil.

Hunter's Atlas Started This Afternoon….

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