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Break-In process for 2-Stroke Vintage Husqvarna Motorcycles

First, start with fresh 92 Octane pump gas.  Gas older than 5 weeks is considered bad due to low quality fuels of today.  Mix your gas to a 32:1 ratio with just basic gas mix, don't need anything fancy like newer bikes do.

For transmission/gear oil, we recommend using basic Valvoline 30wt oil.  This has shown the best results from our experience and just happens to be the cheapest.  NO synthetic oils!


Before your first engine start-up, you must follow the procedure below:

Step 1:  Pre-lube cylinder w/ thin layer of engine oil before installing head.

             Then tighten all head studs to 22-24 Ft-lbs. 

Step 2:  Wait 15 minutes, do not start engine, and then re-tighten studs to the same 22-24 Ft-lbs. 

             Why? Because the pressure will stretch the head studs and the new gasket(s) will flatten.

Step 3:  Start engine, let idle for 5 minutes, then go for a 30 minute ride at no more than 1/2 throttle.

Step 4:  Once engine is cool, re-tighten head studs again to the same 22-24 Ft-lbs, change transmission oil, 

             check clutch cable adjustment, and change the spark plug to finish the break-in process.

You must re-tighten the head studs 3 separate times or you may run the risk of low compression or even possible engine failure.

If you have any questions, then please call our vintage department at 1-800-986-9049 Ext. 2 or you can submit the vintage parts request form.

Written By:
Chris Nicholas - President of Husqvarna OUTLET


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