Bike damage/Cold weather????
Posted December 03, 2002 - 07:40 AM
Can it ever be too cold to ride or will I quit first due to frostbite or breaking my ARSE on a patch of ice? Thanks in advance for the feedback, can't wait until spring/summer!
Mark (highland, Illinois)
Posted December 03, 2002 - 07:51 AM
Posted December 03, 2002 - 10:21 AM
Double check your coolants properties, YZ-F heads don't take much freezing to crack, I have one that is cracked because of that reason.
Posted December 03, 2002 - 03:22 PM
Posted December 03, 2002 - 07:07 PM
Also, it is also easy to "cold seize" your engine if you do not allow it to idle and slowly warm up. What happens if you jump on it and run when cold is that the piston heats up quicker than the cylinder--resulting in reduced clearance between the piston and the cylinder. Other than that, roost all winter!
Posted December 03, 2002 - 11:40 PM
Posted December 04, 2002 - 08:06 AM
My bike is a beast to start when the temps drop below 30deg. Make sure you let the bike idle for a long time to get good and hot b4 ridding. Ive fowled more plugs in the cold by not doing this and taking off b4 the bike is fully warm.
Posted December 05, 2002 - 06:01 AM
Try dropping your SJ (Choke Jet) from the stock 65 to a 55 in the winter...It made a world of difference for mine...I haven't fouled a plug on startup since I changed.
Posted December 05, 2002 - 06:25 AM
Under 50 degrees - Tell the guys to go on ahead, you'll be right behind them - check TV see if anything good is on and make the call.
Under 40 degrees - Race Ricky Carmichael on Playstation
Under 30 degrees - watch your new Jimmy Neutron tape from under the covers.
Under 20 degrees - begin hibernation.
Your bod and bike will both thank you.
Posted December 05, 2002 - 06:29 AM
I've also noticed that I had no tdc at first but after a few kicks, it came back to normal and I was finally able to do my starting routine. What is the cause of that???
Thanks to every one who already provided advises and to those who will.
Posted December 05, 2002 - 11:07 AM
Posted December 05, 2002 - 01:57 PM
You are right about going up on main jet size to match colder, denser air. Running too lean may cause engine damage, as well as reduce power output. I don't know if an "SJ Choke Jet" is an enrichening circuit air or fuel jet but, a cold running engine tends to foul plugs. If it's still easy to start, richening the pilot screw a bit and a bigger main fuel jet should do the trick.
Posted December 05, 2002 - 02:45 PM
Going up on the main does nothing but make things richer and more sluggish.....Have fun, this is the way most of us got our jetting education.
Use your manual to identify the locations of all the jets in the carb. If you don't have the manual, let me know and I'll scan and e-mail the pages you need .
Posted December 05, 2002 - 11:07 PM
Furthermore, if bike is well jetted for warm temperatures, more fuel via a larger main jet for colder, denser air is inevitable to prevent a lean condition.
Posted December 06, 2002 - 05:15 AM
I know the jet next to the main that you are talking about. Isn't this the pilot jet?
Aside from rejetting in the winter my bike is running the stock jetting and runs great. I dont see any reason to fiddle with it. It starts and runs great in the summer. Its just stuborn in the winter. Once running and warmed up in the winter it runs great.