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Jetting and a bog just off idle (Read 65 times)

Bobbert

Serious Thumper

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CHOP IT

Posts: 836
Los Angeles, CA
Gender: male

Jetting and a bog just off idle
07/27/12 at 17:01:27

With a 52.5 pilot jet, anything less than 1.5 turns in and idle slows down. Choke works like it should

With a 55 pilot jet anything more than 2.5 turns out and idle gets bad. Choke floods the bike.

So should I run one or the other?

I also have another issue with BOTH jets. If I ride at a very slow idle and just give the throttle the slightest twist, the engine bogs (not lugging... bogging and hesitating). Seems to get better with the 55, but it's still there for the first 5% of the throttle.

In progress- 1996 Savage: solo seat, pod filter, open exhaust, and custom bars, fender, wiring, paint.

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Serowbot

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OK.... so what's the
speed of dark?

Posts: 28657
Tucson Az
Gender: male

Re: Jetting and a bog just off idle
Reply #1 - 07/27/12 at 18:03:29

If you care about MPG's,.. (I sure do)... go with the 52.5...
Pilot has a big effect on mpg's...

As far a the hesitation... is your idle speed too low?...
Slight hesitation is normal... action/reaction takes a tiny second...
For a tiny fraction of time, when the throttle plate opens, you get the added air before it draws the fuel...
Normal,.. are you being too picky?... Grin

...
If you work that out completely,.. you'll be too rich the rest of the time, and yer' mpg's will suck...
Tis' the nature of carburetion... Wink

...

Ludicrous Speed !... ... Huh

...

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Bobbert Serious Thumper Offline CHOP IT Posts: 836 Los Angeles, CA Gender:	Re: Jetting and a bog just off idle Reply #2 - 07/27/12 at 22:07:56 If I just put the smallest pressure on the throttle and hold that slow speed or downshift and then open the throttle just a crack, the bike sputters and misses and lurches... its not a "hesitation"
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28657 Tucson Az Gender:	Re: Jetting and a bog just off idle Reply #3 - 07/27/12 at 22:15:31 Not sure... but if it's only subtle at a fraction... could your slide be sticking just a bit?...
Back to top	Ludicrous Speed !... ... ... IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Jetting and a bog just off idle Reply #4 - 07/27/12 at 23:36:06 What happens if you do the same test with the choke on the first click?
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Bobbert Serious Thumper Offline CHOP IT Posts: 836 Los Angeles, CA Gender:	Re: Jetting and a bog just off idle Reply #5 - 07/28/12 at 14:59:34 I'll try the choke out with the 52.5. As I said, if I pull the choke on the 55, it's way too much gas
Back to top	In progress- 1996 Savage: solo seat, pod filter, open exhaust, and custom bars, fender, wiring, paint. IP Logged

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