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Verify this jet for me? (Read 10 times)
911radioman
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Re: Verify this jet for me?
Reply #30 - 02/26/06 at 13:47:16
 
Dynobob wrote on 12/31/69 at 16:00:02:
911radioman - I have a 157.5 main jet and 1/2 spacer and last I checked I got 52 mpg. This was on a group ride and I was twisting the throttle quite a bit. You should be getting closer to 55 mpg.

I'm not so sure the white spacer is the problem. I'd check for air leaks and/or exhaust leaks.

I think you'll find everyone here running the half spacer is getting at least 50 mpg.


Interesting.  I've got one person saying the white spacer could be the problem, one person saying exhaust leaks, and another person saying add the K&N air filter and leave everything else the way I have it.

Talk about confused...  ???

Yet again, in reading in "another forum", I see where rejetting is recommended on the Savage with no white spacer mod whatsoever.

I just know I'm missing something here, I just can't put my finger on what it is.
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bentwheel
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Re: Verify this jet for me?
Reply #31 - 02/26/06 at 14:20:19
 
911radioman wrote on 12/31/69 at 16:00:02:
Interesting.  I've got one person saying the white spacer could be the problem, one person saying exhaust leaks, and another person saying add the K&N air filter and leave everything else the way I have it.

Talk about confused...  ???
.

You have been given three ideas on how to solve your problem. That is a good thing. You already discounted the leaky exhaust theory so now you have two left. The filter replacement requires you to order one and wait for it to arrive. Right now, you can go to Radio Shack and buy two #4 washers and install them under your shaved spacer and see if that will lean out your carb enough. Don't get frustrated, we'll get you through this. Remember what I said about doing one thing at a time.
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911radioman
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Re: Verify this jet for me?
Reply #32 - 02/26/06 at 14:40:19
 
bentwheel wrote on 12/31/69 at 16:00:02:
You have been given three ideas on how to solve your problem. That is a good thing. You already discounted the leaky exhaust theory so now you have two left. The filter replacement requires you to order one and wait for it to arrive. Right now, you can go to Radio Shack and buy two #4 washers and install them under your shaved spacer and see if that will lean out your carb enough. Don't get frustrated, we'll get you through this. Remember what I said about doing one thing at a time.


Oh I know.  Frustration is exactly what it is, and not at anybody here by any means!  I just know that I'm within "shooting distance" here and just can't get the last bit of it figured out. Cheesy

Let me run this by you...

I just went outside to the garage and fired the bike up.  Let it warm up for several minutes and put it through some paces revving the engine up and down.  On decel when I'm approaching the idle range, I'm getting a bit of pop and a wisp of black smoke when its almost all the way down to idle.  The black smoke then disappears.

Right now, I'm 1 1/2 turns out on my pilot.  Any leaner and she backfires and shoots a little fire, any richer doesn't really seem to do anything other than I figure I'm sooting my plug up.

Would that indicate to you that I need to add more back to the spacer?  (Bearing in mind that I am at 1/2 spacer thickness now).  

I'm committed to taking this one step at a time, and I think there is something in the idle circuit that is still not quite right.  

Guys, bear with me here.  I know I'm rehashing the same thing over and over, but I'm just trying to get this thing down perfect (or as close as I can).

Thanks for your help in advance!
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necropsy
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Re: Verify this jet for me?
Reply #33 - 02/26/06 at 15:12:23
 
As I stated in my last post, I haven't done these mods myself. I'm only speaking in tech and theory. Having said that....
Just about everybody on this board has shaved the white spacer. Why? Mainly to get rid of backfiring at throttle roll-off.(also to get a little more umpf !!). this allows the needle to stay open just a little more so as not to create a lean condition. Nobody has complained that this has made their bike worse. As bentwheel stated, this is a quick, cheap and and easy fix, but I'm not sure that will help. The way I see it, you've taken care of making sure the emissions are getting out of the engine faster (MAC muffler) and you upsized the jet to get the fuel to the engine faster, but you haven't addressed geting more air into the engine to match the size of the jet installed (you went up 2 sizes when you should have gone 1). To equal out this equation you need to install a high flow air filter or go down 1 size jet.
This is a link to a website that reelthing posted awhile back.

http://www.motorcyclecarbs.com/Motorcycle_Carburetor_Jetting__W7.cfm

Hope it helps
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911radioman
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Re: Verify this jet for me?
Reply #34 - 02/26/06 at 15:23:09
 
Thanks guy!  What you said makes sense now that I see it written out that way.  Guess the K&N will be next on the agenda, because I'm really not in the mood to tear the carb apart again to swap jets. Cheesy
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911radioman
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Re: Verify this jet for me?
Reply #35 - 02/26/06 at 15:29:46
 
pgolden wrote on 12/31/69 at 16:00:02:
Go ahead and get a K&N drop-in. $35.75 and you never buy another filter, you just clean and reoil the K&N.


What are you guys using to reoil your filters?  I notice the recharge kit that is available for these.  Are these necessary, or are you using some other type of oil?
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Savage_Rob
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Re: Verify this jet for me?
Reply #36 - 02/26/06 at 17:50:53
 
I use the K&N stuff.  I have K&N filters in both cages and the bike and the same detergent and oil are used for any of 'em.  You can Google air filter oil and get a number of hits on various brands and merchants.  Most should be fine in a K&N, since it's metal and cotton.  I'd be a little more cautious on foam filters and use only the recommended oils, as incorrect oils might dissolve the foam.
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babbalou
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Re: Verify this jet for me?
Reply #37 - 02/27/06 at 20:19:55
 
911radioman wrote on 12/31/69 at 16:00:02:
What are you guys using to reoil your filters?  I notice the recharge kit that is available for these.  Are these necessary, or are you using some other type of oil?

Here's an odd idea; I've been lubing my K&N filter with honey. Mixed it with hot water, poured it on & let the water evaporate. Now the element is REALLY sticky. Dust ain't getting past that! Grin I'll rinse it out & do it again this summer. Probably no better than oil but I tend to think up weird ideas sometimes to see how they work.  No, I don't park it near antbeds. Smiley
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911radioman
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Re: Verify this jet for me?
Reply #38 - 02/27/06 at 20:51:32
 
babbalou wrote on 12/31/69 at 16:00:02:
Here's an odd idea; I've been lubing my K&N filter with honey. Mixed it with hot water, poured it on & let the water evaporate. Now the element is REALLY sticky. Dust ain't getting past that! Grin I'll rinse it out & do it again this summer. Probably no better than oil but I tend to think up weird ideas sometimes to see how they work.  No, I don't park it near antbeds. Smiley



You might want to stay away from beehives too! Cheesy
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babbalou
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Re: Verify this jet for me?
Reply #39 - 02/27/06 at 21:06:25
 
911radioman wrote on 12/31/69 at 16:00:02:
You might want to stay away from beehives too! Cheesy

Didn't think of that. Grin
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Savage_Rob
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Re: Verify this jet for me?
Reply #40 - 02/28/06 at 05:21:05
 
Heat can crystallize honey too.  If that happens, it won't be very sticky anymore.
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JerryAssburger
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Re: Verify this jet for me?
Reply #41 - 07/28/06 at 01:08:20
 
Well Crud- I read with HUGE INTEREST 911radioman's thread, only to find it 5 months old and with no ending. I am experiencing a similar problem, and was hoping to find the answer.
My set up is this: SE2 pipe (loud!), stock air filter, 152.5 main, stock pilot, 7/10ths spacer distance, de-snorkel, and mixture screw about 1.25 turns out (stripped and jammed). It is averaging 49 mpg, no hot-rodding, tire pressure and brake-drag checked.
I've noticed the top of the header getting a bit bluer instead of the brownish gold it used to be. It's been 3 tankfulls since the mods. Bike runs really nice- kind of a flat spot at 1/4 light load throttle. Going to check the plug tomorrow.
I might try removing 1 of my needle washers, bringing it to slightly less than "1/2 white spacer" but I think that'll mess up my mileage even more.
Any of your experience would really be appreciated!
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LANCER
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Re: Verify this jet for me?
Reply #42 - 07/28/06 at 05:47:01
 
Your blueing pipe would suggest a lean condition.  Your flat spot at about 1/4 throttle would suggest the same.
With the pilot adj screw being stuck at 1 1/4 turns out you cannot richen the mix as it is, so you might go to the next larger size pilot and remove some more of the washers to get the needle to at least the 1/2 white spacer position ... if not more.  
You have the SE2 muffler, which is a very high flow muffler and thus requires plenty of fuel to mix with all of that air.  I think you should also consider going to a 155 main jet.
Do the changes one at a time and note how the bike is running and what the plug looks like.  If you start getting BLACK SMOKE and/or the engine seems to be bogging down then you are getting too rich ... otherwise ... let 'er have the fuel until then.  When you hit the place where it starts smoking/bogging, stop and back up one size.  That will be your best jet size or needle setting.
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JerryAssburger
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Re: Verify this jet for me?
Reply #43 - 07/28/06 at 16:32:00
 
THX for the info. I'll attack it Sunday; I have to go to work tonight, so I'll pay extra attention to how it acts at different throttle positions. There's a website that kind of helps with this....

http://www.factorypro.com/tech/carbtun.html


I'm hoping that if I must richen it up, that I don't lose my mpg.
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JerryAssburger
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Re: Verify this jet for me?
Reply #44 - 07/31/06 at 09:31:27
 
Brief update. Now at 155 main/ 1/2 spacer distance, and the bike seems to run a lot smoother at 1/4 throttle on up. No detectable difference on the top end, but a friend was following me and said no smoke. At least I'm not too rich yet. No clue on the mileage, but thx for all the help so far.
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