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When it is cold the metal contracts when heated The Engine block expands! When your engine is cold and you run hard you can crack you block or anything really .... your engine when warm has more give to it. So never rush the warm up but holding the throttle WO. The easier it warms up the better. If your warm it up for more than a minute put it on the centerstand I have heard some Urban legends about oil not properly lubricating when the bike is leaned over. (in general)
Hope I made sense!
Gee, I really don't have a choice w/my bike. Ever since I jetted it, it's semi-hard to start. You have to have the choke exactly in the 1/2 position. Full choke - no start, no choke - no start. After it starts, it's gotta run at about 2500 rpm for at least five minutes before unchoking or the engine dies. ONce it's warmed up, it runs like a top for hours on end. Anyway, warm up is extremely crucial for any motor that runs at extremely high rpm's. Two words; motor oil. You engine's blood. Even when it's 95 degrees outside (it's 97 right now in San Antonio!) your oil is still much too thick to lubricate properly. Also, it takes a few minutes for the oil to get pumped to all the vital nooks and crannies that need to be lubricated. Sit there for 5 minutes and use that time to check for nails in the tires, proper signal functioning etc. Preflighting the bike is something I do every single time the bikes been sitting for more than a few hours OR if the bike's been out of my sight. I.E. while I was inside the restaurant getting a bite to eat.
"Do you know how fast you were going, son?" "Gee officer, if I guess right, can I go home?"
<BLOCKQUOTE><font size="1" face="Aril, Helvetica, sans-serif">quote:</font><HR>Originally posted by GodCreatedOne: my gsxr is fuel injected and i have a choke on mine also
Not really a "true" choke. Just speeds up the idle.
I've found that my bike stalls when shifting from 1st to 2nd if the temp is less than 100 degrees. Not sure if this is normal. So I just let it warm up for a minute and a half or so and off I go. I read in Motorcyclist that if you let it warm up too long the acids condensing from the combustion can eat away at the innards. Anyone else heard of this?
[This message has been edited by scotty (edited July 11, 2000).]
<BLOCKQUOTE><font size="1" face="Aril, Helvetica, sans-serif">quote:</font><HR>Gee, I really don't have a choice w/my bike. Ever since I jetted it, it's semi-hard to start. You have to have the choke exactly in the 1/2 position. Full choke - no start, no choke - no start. . .<HR></BLOCKQUOTE>
This sounds like you are running too rich. I don't know too much about carbs but this seems consistant with too much fuel.
And BTW the choke allows for more fuel than air mix into the carbs, not just an idle increase.
And for the main point, let the engine warm. This is a vital process for expansion of the sleeves, pistons, and valves etc. All the gaps need to seal, fuel injected or not. Oil doesn't really need too much time to run into the engine. If you have ever seen oil injected you'd see it's pretty fast (seconds). Most of the time the oil sticks to the metal anyway.
------------------ You get the best thrills on two wheels!
[This message has been edited by VYPIR (edited July 11, 2000).]
Carburated bikes do need a LITTLE more time to warm up than F.I. bikes.Fuel injected bikes aren`t as finicky to ride when cold(at least mine isn`t).I usually ride away when the temp reads 30 degrees C.
I do a lot of round town riding on my F3, and this has caused a bit of plug fouling (especially now its winter (sth hemisphere)). Therefore I try not to leave the bike idling for too long. If it's real cold I let it idle at full choke for upto about 30secs. After cutting the choke, the bike will normally sit at a smooth idle of between 12-1400rpm. I generally take it pretty easy for about the first 5-10mins of riding to let it warm up fully before I begin to give the engine any sort of workout.
Letting your bike warm up is a good thing, Think of your bike like you, when you wake up and it's cold out you dont want to do much, but after a shower and your warmed up you feel a little better. so let the bike warm up so the head,pistons and case are the same temp, not all metal heat up at the same speed. Warm oil moves and lubricates better than cold.
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