SuzukiSavage.com - New Motor Runnin' Hot

ocdave

Ex Member

New Motor Runnin' Hot
07/06/11 at 15:24:37

I'm trying to get my replacement motor dialed in. I'm using my old carb but for some reason the motor seems to be running extremely lean. I'm running a dyna exhaust and a k&n cone filter setup. I want to say that the main jet is a 150 with the stock pilot and a white spacer mod. I've increased the idle and currently about 3 turns out on my fuel screw. The backfiring has been eliminated but still running hot. I've put in some new rotella 15w-40.

I'm dumbfounded on why my old carb and exhaust setup is not compatible with this new motor. Should I make some further carb adjustments? Is it the main jet that needs to be increased?

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28699 Tucson Az Gender:	Re: New Motor Runnin' Hot Reply #1 - 07/06/11 at 15:27:40 Are you just idling too long while testing?... No air-cooled motor will idle for very long without overheating... I'd say 5 minutes, then it needs airflow...
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RpNSht Ex Member	Re: New Motor Runnin' Hot Reply #2 - 07/06/11 at 15:34:22 whats the size of a stock pilot jet?
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CalisOsin Senior Member Offline Rather die, than live down on my knees. Posts: 297 Orange County, Ca Gender:	Re: New Motor Runnin' Hot Reply #3 - 07/06/11 at 15:36:57 Hey Dave, glad you got your new motor, sorry it's not working out for you though. if you need an extra set of hands give me a call.
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EJID Serious Thumper Offline Work to ride and ride to work. Posts: 1536 Pocatello, ID Gender:	Re: New Motor Runnin' Hot Reply #4 - 07/06/11 at 15:46:56 wheelchairstuntn wrote on 07/06/11 at 15:34:22: whats the size of a stock pilot jet? My stock Main was 145 and Pilot was 52.5 (on an 05)
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ocdave

Ex Member

Re: New Motor Runnin' Hot
Reply #5 - 07/06/11 at 16:03:13

Serowbot wrote on 07/06/11 at 15:27:40:

Are you just idling too long while testing?...

No air-cooled motor will idle for very long without overheating...
I'd say 5 minutes, then it needs airflow...

The stock pilot is 52.5. No, I'm running it around the neighborhood on short tests. I'm afraid to idle it at a standstill. Is it possible I've clogged a jet?

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28699 Tucson Az Gender:	Re: New Motor Runnin' Hot Reply #6 - 07/06/11 at 16:09:42 Oh yeah,... that's always possible... How long was the carb sitting?... even if it wasn't long, removal and install could have put a bit of sediment in the passage...
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ocdave Ex Member	Re: New Motor Runnin' Hot Reply #7 - 07/06/11 at 16:09:43 CalisOsin wrote on 07/06/11 at 15:36:57: Hey Dave, glad you got your new motor, sorry it's not working out for you though. if you need an extra set of hands give me a call. Thanks, I appreciate the offer. If I ever get this thing running right we'll have to get together for a ride.
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drums1 Serious Thumper Offline '87 Savage Bashed--Down for the count Posts: 664 Racine, Wisconsin Gender:	Re: New Motor Runnin' Hot Reply #8 - 07/06/11 at 21:30:09 Just for the sake of conversation, what happened to the old motor, and do you still have it? I punched a hole in the bottom of mine. So far my JB Weld repair is holding, but I fear it may not be the end of my nightmare. I may be in the market for a parts motor, to make mine whole again.
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dasch

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Re: New Motor Runnin' Hot
Reply #9 - 07/07/11 at 03:49:50

sounds dumb, but how do you know it's overheating ? Aircooled engines get fairly hot, and cruising around the block is not really supplying massive airflow.
I have a dyna performance (read: straight through) muffler and KN cone filter. Main is 150, pilot I think 52.5, needle one notch up (yes, my needle has notches). It feels really hot at traffic lights, but on the open road... no problem. Dare you to test it on the road and post what happens?

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Routy

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Re: New Motor Runnin' Hot
Reply #10 - 07/07/11 at 04:45:53

Dasch asked it right,....what makes you think its overheating ?
You never said anything about it not running correctly, so we can only assume it is.
It is impossible to have a clogged passage or jet, and still have it run correctly.
What ambient temps are we talking ?
Every air cooled engine on this planet is overheating at anything near or above 90 degrees.
Hot idling ? Will it will run hotter idling ? I am not so sure.
It will "appear" to run hotter while idling, but remember when idling there is not much fire, so it doesn't take much cooling. It will actually get a lot hotter above idle rpm standing still, than it ever will at a dead idle.
I myself hate running an air cooled engine on a hot day, because you're right, it is overheating,......all the time.

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Rich
'07 S40 Blvd stocker, except drilled OEM exhaust and white spacer mod...1/2 (.055)

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dasch

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Re: New Motor Runnin' Hot
Reply #11 - 07/07/11 at 05:03:55

Darn right Routy! It just appears hotter when you're sitting still. Heck, it only burns a drop of gas per minute... Never thought of that that way.
My old 4cyl suzuki had this switch that killed the engine when oil got too hot. Also air cooled it was. And I remember it did that twice on traffic lights after rides in heavy city traffic. Before it would kick in, bike lost power and hesitate and miss beat...

And why is this guy now an ex member???

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