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Message started by 01suzsavage on 06/01/15 at 14:42:30

Title: lag after opening up throttle
Post by 01suzsavage on 06/01/15 at 14:42:30

I have an 01 savage 26,000 miles jardine slip on. I have a question about the throttle response on my bike. It seems to be mostly in 3rd and 4th gear. Whenever I crack the throttle wide open to pass or catch up if I'm behind the group it seems to lag for about 3 seconds than i feel the power kick in. I can't tell if its revving up than grabbing or if its just lagging to take off. It almost seems like the clutch slips for a second but i cant tell. Other than that the bike shifts and runs great! I just got this bike a couple months ago and i love it. Thanks

Title: Re: lag after opening up throttle
Post by justin_o_guy2 on 06/01/15 at 15:16:21

I'd rather have some peace of mind in the cam chain area first.
Even if it's been done once, you're at twice the mileage of
Time for cam chain check.

Title: Re: lag after opening up throttle
Post by old.indian on 06/01/15 at 15:20:04

If I hammer it in 4th or 5th it takes a bit for the engine to react, but if I just roll it on, "no problem". It must be something to do with the fact that it has a carburetor, because all my bikes acted the same and all had carbs...

Title: Re: lag after opening up throttle
Post by 01suzsavage on 06/01/15 at 15:21:38

Ya i probably should. I can see RTV around the side covers and case so I'm pretty sure somebody's been into there before but i don't know what they did.

Title: Re: lag after opening up throttle
Post by justin_o_guy2 on 06/01/15 at 15:38:24

I would not want to start it again till I knew that the tensioner was not about to spit its guts.

Title: Re: lag after opening up throttle
Post by HovisPresley on 06/01/15 at 16:26:35

Have you changed the oil, and if so, which oil did you use?
Some oils can reduce the friction between the clutch plates resulting in symptoms similar to what you describe.

Also, having a CV carb fitted as standard, isn't going to win any prizes for throttle response.

As Justin said, if the bike is new to you, order a clutch-side gasket just in case, but take the cover off and check the state of the cam belt tensioner. This is important.

Also, as old.Indian said, steadily open the throttle rather than whacking it open works best. It's a big single cylinder with a CV carb.

Hope this helps :)

Title: Re: lag after opening up throttle
Post by 01suzsavage on 06/01/15 at 17:35:33

I changed the oil and filter 2 months ago when i got it. used K&N filter and valvoline 10w40 4 stroke motorcycle oil (comes in black bottle). I will check the cam tensioner soon. I'm riding the bike everyday right now. I just rode in a run for a blessing with a bunch bike HD's and Hondas and they couldn't believe the sound my bike made with that jardine pipe on it. I made a few HD's sound liek sewing machines haha ;D

Title: Re: lag after opening up throttle
Post by 01suzsavage on 06/01/15 at 17:37:59

She's in pretty good shape for the mileage :)

Title: Re: lag after opening up throttle
Post by HovisPresley on 06/01/15 at 17:59:38

Has the carb been re-jetted to suit the exhaust and air filter swaps?

Title: Re: lag after opening up throttle
Post by justin_o_guy2 on 06/01/15 at 18:34:35

Every time I read this thread I hear the theme song from Jeopardy.

Title: Re: lag after opening up throttle
Post by 01suzsavage on 06/01/15 at 19:44:30

The guy i bought it from told me he rejetted the carb bit i have no idea what jet kit he used. He told me the dealer did it. Jeopardy?? Lol

Title: Re: lag after opening up throttle
Post by justin_o_guy2 on 06/01/15 at 19:49:44

504F494E53546555655D4F43083A0 wrote:

Every time I read this thread I hear the theme song from Jeopardy.

Only louder...

Title: Re: lag after opening up throttle
Post by 01suzsavage on 06/01/15 at 20:12:52

What is......... I should probably rejet my carb?? Alex.............????

Title: Re: lag after opening up throttle
Post by corey v84 on 06/01/15 at 20:56:22

I'm willing to bet it's the jetting, only way to know is to take it apart and see what's in there

Title: Re: lag after opening up throttle
Post by justin_o_guy2 on 06/01/15 at 20:56:29

213E383F22251424142C3E32794B0 wrote:

I'd rather have some peace of mind in the cam chain area first.
Even if it's been done once, you're at twice the mileage of
Time for cam chain check.

Title: Re: lag after opening up throttle
Post by verslagen1 on 06/01/15 at 21:44:57

63787274637072746321202022110 wrote:

Your slide might be sticking.
a dose of seafoam will do the trick.

Title: Re: lag after opening up throttle
Post by Gary_in_NJ on 06/02/15 at 01:19:53

If this is a new condition, it could be a clogged main jet or as suggested above a sticky slide. Either way a good cleaning will resolve the issue. If this condition has alway existed, you have a lean main or needle (depending on how wide you are opening the throttle). At what throttle setting 1/2, 3/4, full) do you notice the lag?

Title: Re: lag after opening up throttle
Post by 01suzsavage on 06/02/15 at 04:32:03

Only at 3/4- to full throttle

Title: Re: lag after opening up throttle
Post by Dave on 06/02/15 at 05:01:49

Actually......you should not get in the habit of "cracking" open the throttle - but rather rolling the throttle on. When you instantly open the throttle the vacuum in the venturi drops drastically, and the ability of the carb to pull fuel through the jets is compromised. The CV (Constant Velocity) carb is supposed to help keep the engine running well when this condition occurs by sensing the drop in the vacuum and it drops the slide/needle to keep the air flow high enough to sustain the vacuum. So....when you crack open the throttle the slide drops, and gradually raises as the engine responds and builds up adequate air flow to allow the slide to rise up to the full throttle position. Should this take 3 seconds.....probably not in an engine that is jetted properly - but there is some lag in the CV carb when you make an abrupt change in the throttle position.

In a non-CV carb the drop in vacuum sometimes can result in so low of a vacuum that the fuel flow stops - and the engine just coughs and stops running until you let up on the throttle a bit. This is especially true on modern engines that are jetted really lean to comply with the emission requirements. The CV carb design is used to help make a smoother running engine, and correct for an over-aggressive application of throttle (just like ABS brakes correct for too much braking or Traction Control correct for too much power). However the CV carb is mechanical and not digital electronics....so there is a bit of a lag to be expected. (Proper jJetting could however help to shorten the lag).

Title: Re: lag after opening up throttle
Post by Gary_in_NJ on 06/02/15 at 15:10:33

100B0107100301071052535351620 wrote:

Only at 3/4- to full throttle

Go up one size on your main jet. While you're at it, clean the carb.

Title: Re: lag after opening up throttle
Post by 01suzsavage on 06/02/15 at 17:03:19

Thanks for all the advice ;)

Title: Re: lag after opening up throttle
Post by HellOnWheels on 10/11/15 at 14:42:02

Im trying the seafoam method on my '87 savage right now. Bike rode fine last night but when i parked, i left the raptor petcock on :-? and 3/4 of the gas leaked out. Put new gas in, rode home perfectly, and parked in my garage overnight (with the petcock off). Took for a ride today and throttle response was horrible.

Title: Re: lag after opening up throttle
Post by justin_o_guy2 on 10/11/15 at 14:56:34

Kinda depends on the gear/rpm you're at when you nail it. If you're just rolling along and at the lowest speed you can be at IN That Gear, You might wanna drop a gear and pin its ears back. .but the Seafoam treatment for a coupla tanks won't hurt.

Title: Re: lag after opening up throttle
Post by verslagen1 on 10/11/15 at 15:11:32

Hell, I hope checked your oil level.

Title: Re: lag after opening up throttle
Post by Steve H on 10/12/15 at 04:58:17

I'm with Versy. I hope the oil was checked. Could be an engine with a gallon or so of gas in the oil and very little lubrication.

Title: Re: lag after opening up throttle
Post by HellOnWheels on 10/12/15 at 15:55:35

So I put a splash of seafoam into about a 1/4 tank of gas last night. Today after work I went for a ride and the the throttle was still not very responsive, until the seafoam worked its way through the carb. Now its more responsive than ever

Title: Re: lag after opening up throttle
Post by HellOnWheels on 10/12/15 at 16:00:52

Oil level was and is good. Just changed over the weekend

Title: Re: lag after opening up throttle
Post by justin_o_guy2 on 10/12/15 at 16:10:10

You haven't addressed the point I made about the speed and gear when you want to accelerate. It's not gonna Hop when the gas gets poured on If you are at the low end of the speed you can be in in third. If you're rolling along in third, just going fast enough to not be lugging it and decide to accelerate and you want it to get up and go Right Now, it's not gonna do it. Once the RPM come up, Then it will start accelerating hard. Try dropping a gear if I'm describing the way things are going.