How to start an Husqvarna CR450?

an old trick is to run a longer fuel line and allow it to do a loop below the carb, this acts as a natural trap for crap. or use a filter.. you can use staright 20 wt briggs and stratton engine oil for the gearbox. for the air cooled bikes i would run a mineral based two stroke oil such as valvoline or tts at 30 :1. Maxima should be fine as well and smells good.

chuck a handfull of nuts and bolts in the tank with some soapy water and do the shimmy shake for a while. this will sandblast the loose crap off the walls. rinse well then slop some metho around in it to grab the water out as a finisher. if it needs a liner it it, follow the instructions carefully

I just want to provide an update to everyone that might have had a similar issue.
If the bike doesn't start check the ignition for spark, an old bike is bound to need a new ignition the bing carb also needed to be rebuild.
1- I installed a new Mikuni carburator, mainly because it was the option everyone with these bike goes for and it also includes a choke, therefore super easy to start the bike.
2- Ignition had a spark, but it seemed very weak, therefore I also decided to install a new electrex electronic ignition. Again this seems to be what everyone goes for.

After both Ignition and carburator were installed even after an entire year in storage, the bike started first kick.

I've also just managed to register the bike with the DVLA as an historic vehicle to get it road legal with a Daytime MOT. After just 10 days the DVLA sent me the V5C with an age related registration plate, nice and easy.

Sweet

Good to know that by combining a carb with a choke and an ignition with an electronic advance makes these old 450's easier to start. I wonder how far the ignition retards the timing to achieve easier starting.

Carb an ignition numbers please. I kicked the shit out of mine this weekend and no start. My leg and lower back are paying for it now. Chris

I bought the Mikuni carb with a bolt on conversion kit from Chuck Cureton at Huskyjunk.com it's a nice and easy job to install the kit.
The ignition was completely beyond my knowledge, therefore I asked for help from Lee Perry at Husqvarna Man which is just one hour drive from my house. He got a brand new electrex electronic ignition that is specified for a 1986 husky but mixed a few parts to build a bespoke one for my bike. Lee as got all the merit and amazing knowledge of all husky models, he even builds bespoke 4 stroke husky.

I can tell you the thing is very easy to start now, but I've also installed a decompression valve to make it easier, which is shown on one of the earlier posts.

The only concern now is that you need to check all bolts and nuts are tight each time you ride it or you'll start losing parts along the way.