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Message started by odakira on 10/24/19 at 20:36:07

Title: Jet size question
Post by odakira on 10/24/19 at 20:36:07

Ive got a 1999 Savage that Ive switched to a 52.5 / 155 jet combo. Just wondering if these two jets are okay at their current sizes or do I need to change them out? Figured I might be able to get an answer before putting frankenstein back together.

Thanks!

Title: Re: Jet size question
Post by batman on 10/24/19 at 21:16:01

The jets in the picture, are air jets , they should be left alone.

Title: Re: Jet size question
Post by odakira on 10/25/19 at 00:14:38

7172677E727D272B130 wrote:

The jets in the picture, are air jets , they should be left alone.

Gotcha! Just wanted to be extra sure. Thank you!

Title: Re: Jet size question
Post by Gary_in_NJ on 10/25/19 at 07:04:55

Yeah, what Batman said.

The 155 main is a fat jet. What jet did you have in the main prior and what modifications did you make?

Title: Re: Jet size question
Post by batman on 10/25/19 at 18:09:12

What Gary said ,and your location (elevation above sea level) also influences main jet size.

Title: Re: Jet size question
Post by odakira on 10/25/19 at 19:08:23

515B5F555E57535A040206360 wrote:

Yeah, what Batman said.

The 155 main is a fat jet. What jet did you have in the main prior and what modifications did you make?

I bumped up the main from 145 to 155, the pilot jet from 52.5 to 55. Took out the white spacer and swapped it for some flat washers that are about half the size of the white spacer. Switched out the stock muffler for an Emgo slash cut muffler that is "baffled".

I'm in the St. Louis, Missouri area. Elevation is roughly 400-600 ft above sea level.

Title: Re: Jet size question
Post by batman on 10/25/19 at 21:14:37

I'd start by checking your mileage , I think you'll find it's in the low to mid 40's , which would mean your jets are a bit to large. I have St. Louis as 465ft above sea level . I run between 400 and 1300 ft and run a stock 52.5 pilot , 150 main and 3 washer on the needle .with a high performance air filter and stock baffled Dyna muffler . 55/155 jets are usually only used at sea level. checking your sparkplug I think you'll find it's still pretty black. If that 's true ,I'd think about smaller jets for both better mileage and performance.

Title: Re: Jet size question
Post by odakira on 10/25/19 at 22:41:28

4043564F434C161A220 wrote:

I do have a 150 main jet on hand. I'll go ahead and switch back to that and the 52.5 pilot and see how it does for me. I don't have much riding weather around here really so it's not a big deal if I gotta shelf the carb until the next riding season.

Thank you again for all your input!

Title: Re: Jet size question
Post by Gary in NJ on 10/26/19 at 04:19:13

I think the 52.5/150 would be about right.

Title: Re: Jet size question
Post by Dave on 10/26/19 at 05:25:32

0D0969352A3134363A5F0 wrote:

I think the 52.5/150 would be about right.

Yep.......I agree.

I live in the Cincinnati area......elevations between 500 - 800 msl. The #150 main always worked best, the #50 pilot works best on some bikes.....on other bikes a #52.5 is better.

A stock engine with a #155 or larger jet will run - but it will be overly rich and just run sloppy. The engine runs so much crisper with proper jetting!

Title: Re: Jet size question
Post by batman on 10/27/19 at 17:21:05

ALL TRUE ! but I think you should do the spacer mod as well . to prevent sag in the mid range where the bike spends most of it's time.

Title: Re: Jet size question
Post by zipidachimp on 10/27/19 at 18:11:01

+1 on the 52.5/150 jets, 152.5 is the biggest I'd try. Cheers! 8-)

Title: Re: Jet size question
Post by BrokeAss on 11/02/19 at 16:18:15

I've run a 160 main jet on several Savages (Central Ohio, ~1000ft above sea level) as per 6Sigmas suggestion. They also included a 165 in case the 160 wasn't big enough. Cone filter on a 90* silicone elbow, debaffled aftermarket or Harley exhaust, clipped diaphragm spring. Good mileage, clean burn, AMAZING throttle response. Your Results Clearly May Vary...

Title: Re: Jet size question
Post by batman on 11/04/19 at 04:21:00

BrokeAss , What do you get for mileage? Got a number? what is your pilot jet size ,what did you do for the spacer mod?

Title: Re: Jet size question
Post by BrokeAss on 11/06/19 at 19:02:13

282B3E272B247E724A0 wrote:

BrokeAss , What do you get for mileage? Got a number? what is your pilot jet size ,what did you do for the spacer mod?

*****************************************************

Too old and not broke enough to pay attention to mileage. My Buddy rides the last one I built and he's not complaining. When we do a day ride he stops once in 8hrs same as the rest of us. I wanna say the pilot is 52.5, but don't quote me, too many bikes go thru here to recall. It's whatever 6Sigma suggests and sends with their kit. Needle gets 2-3 washers I believe, and the slide spring gets trimmed. Bike starts so much quicker, doesn't smoke or stink or get hot.