1976 360WR Restore

[eveready]

I bought a 1976 360WR that is wore out, But that is what I was looking for. The wife isn't happy but living in the garage aint that bad. I attached a pic. of what I brought home. No compression, no paint, suspension is shot, wrong seat, fenders and wheel bearings are bad. Good news is tranny seems to shift through all 6 gears. I've already tore down to the frame to get sand blasted. Bought new plastic kit, seat, gasket and seals kit, sourced a 1st over piston and ring. I bought shop manual and owners manual. Pulled the top end off and took to the machine shop, but can't find tolerence's for piston to cylinder clearence and end gap on the rings. The book tells you what's bad but not what to bore to. Can anyone give me that info.? And I need to make tools to split cases, does anyone have a paper template of these tools. Will post more pics. as it goes together. Thanks

 

[grouty]

Nice looking project ! keep us updated with lots of pics please.

The piston manufacturer will have a stated clearance (usually written on the box). I have just bought one for my 78 390WR at 84.0mm. The Wossner spec is .08mm, but I will do it at .09mm. We bored the 390 Auto to .10mm to give it plenty of clearance as it runs so hot.

 

[Chayzed Pilot]

Your rear shocks are Curnutt's. If you are not going to use them don't throw them away, I will buy them from you. If you decide to use them I do full rebuilds and restoration on them. I really like the 76 bikes. You have a cool project there and I will follow along.

 

[eveready]

I bought the piston on ebay it was in a Husqvarna box with part# and made in Germany. No clearances.



Chayzed Pilot what do you get to redo these shocks? And how about forks?

 

[Chayzed Pilot]

Send me a PM please.

 

[Crashaholic]

Chayzed Pilot what do you get to redo these shocks?

I've had Chayzed Pilot rebuild 2 pairs of Curnutts for me, one pair gas and one pair non-gas. He helped me work through some issues with the application on a bike like yours. The man knows his stuff when it comes to Curnutts.

 

[Crashaholic]

The wife isn't happy but living in the garage aint that bad.

Ladies usually don't understand a mans attachment to motor vehicles but when she finds out what a happy boy you've become owning a new dirt bike project she'll be glad to let you back into the bedroom.

 

[Crashaholic]

but can't find tolerence's for piston to cylinder clearence and end gap on the rings. Can anyone give me that info.?

There isn't any one set clearance that's recommended. I've seen many different numbers recommended by folks on Café Husky. I rebuilt a 75 360 last year and John at Vintage Husky recommended .005" on the piston. I've seen guys go as low as .004"

What I've learned about seizing is that the piston clearance isn't so much the problem as is improper jetting for your riding conditions and air leaks in the crankcase and intake, I can't stress this enough. A leak down test is essential to a successful rebuild. It checks the integrity of the gaskets and seals. I use a measurement of 6psi with a loss of 1psi in 5 mins. I'm sure theres other opinions on these numbers but the main thing is to correct big leaks before starting the bike. Hope this helps answer your question.

 

[eveready]

.005 sounds good to me as I'd rather error on the loose side. How about ring end gap? Will do a leak down for sure. It has a aftermarket VM38MM Mukuni on it that I'm jetting to 390 specs. to start.

 

[eveready]

Chayzed Pilot I think I sent you a message but not sure. New to forum and how stuff works.

 

[grouty]

You will probably find you will have to come down one size on the pilot jet and lean the needle off one notch from the std 390 spec.
That worked fine on a friends 360 after we took the Gurtner carb off.

 

[Chayzed Pilot]

Chayzed Pilot I think I sent you a message but not sure. New to forum and how stuff works.

I sent you a response back. Don't know if I did it right.

 

[eveready]

Grouty so that would be the bottom notch on the needle?

 

[wrx]

raising the clip or dropping the needle phrase means leaner . hope this helps .

 

[grouty]

I can't remember the stock needle setting for the 390, but yes, you need to go one notch leaner. As wrx said raising the clip is dropping the needle (leaner).

I know it's $$$, but the Lectron is worth it's weight in gold. Sooo much easier to set up and runs so much better.

 

[dumpbear]

It looks like to me you have a77" Burleson replica. curnutts, looks like a mikuni and those alum bars look just the ones on my bike.The 76" had the metal air box cover and the mag cover is round.The round cover was put on in 77.All you need is preston petty light and a P.P mx rear fender w/light and a 24 min.VDO enduro clock,route sheet holder and a score card holder and its complete.Looks good and good luck.P.S they will eventually back in the house especially if the garage is full of husky and there is no room for you

 

[eveready]

I just run the frame # ML154xx engine 2052 2420. I think your right it's a 77.

 

[Desmoducky]

Have Fun!



Desmo

 

[Desmoducky]

You can contact Vance at Q&E machine in Anaheim Hills, California. He can tell you exactly what it has to be. He did my 1976 WR360. Just google Q&E, contact him and you'll be talking to the premier two-stroke machining maniac (expert) in SoCal.

Desmo

 

[eveready]

What a beautiful bike. Mine won't look that good i'm just refreshing it to ride in the woods. I sent Vance an e-mail for his advice on bore and ring end gap. We'll see if he answers. Thanks for the tip. Is yours a 76 or 77.