SuzukiSavage.com - Print Page

SuzukiSavage.com
/cgi-bin/YaBB.pl
General Category >> Rubber Side Down! >> Bike dies when deaccelerating from 60
/cgi-bin/YaBB.pl?num=1530129944

Message started by NewbCycle on 06/27/18 at 13:05:44

Title: Bike dies when deaccelerating from 60
Post by NewbCycle on 06/27/18 at 13:05:44

A little background, a friend of mine wanted to learn how to ride a motorcycle. So I said what the heck? I let him ride my newly painted Savage darling, and then, all the sudden he decides he is a pro. He laid the bike over going 15-20 miles an hour. It's scraped the front fender and bent the right side foot Peg. Other than that, the bike appears to be fine cosmetically. Now the bike backfires a lot And dies when rolling off after going 60+ mph. Any suggestions??

Title: Re: Bike dies when deaccelerating from 60
Post by bobert_FSO on 06/27/18 at 14:18:48

Could be a vacuum petcock problem. It could also be a vacuum leak. Check the vacuum line between the carb and the petcock to make sure it isn't leaking or got pulled off when the bike was dropped.

Title: Re: Bike dies when deaccelerating from 60
Post by batman on 06/27/18 at 14:50:05

Technically speaking , your bike isn't backfireing (through the carb) but after firing through the muffler. Assuming the bike was dropped on the right side (bent right side peg) I'd be checking for an exhaust leak ,loose or broken header bolts ,or the joint where the header pipe and muffler meet. Air entering at either would cause "backfiring" and maybe a change in back pressure that might cause stalling when you close the throttle.I'd also check the carb for any change -loose vacuum line, missing fuel screw, loose clamps,loose mounting bolts at the head, throttle cable as it leaves the grip , idle screw setting, etc.

Title: Re: Bike dies when deaccelerating from 60
Post by justin_o_guy2 on 06/27/18 at 15:13:27

If the idle is low
And
You chop the throttle
It'll die..

Make sure the idle is right
Control the gas

Title: Re: Bike dies when deaccelerating from 60
Post by NewbCycle on 06/27/18 at 22:45:45

Okay, so here's what I've done so far. I verified the carb is in good order, the exhaust doesn't appear to be leaking (took a piece of toilet paper and went around the exhaust watching for movement), and none of the header bolts are cracked that I have found (took the head off to look at the cam chain). Would an impact be enough to cause the cam chain to jump a few teeth on a Gear? I think it's timing is pretty off?

Title: Re: Bike dies when deaccelerating from 60
Post by LANCER on 06/28/18 at 08:45:02

I've not heard of that happening.
If some else has then chime in.

Title: Re: Bike dies when deaccelerating from 60
Post by batman on 06/28/18 at 09:21:02

compression ,spark and fuel =run, . You need to be looking inside the carb , pilot jet,float level, fuel screw, and more importantly the TEV valve. The TEV valve opens and feeds extra fuel to the intake when the throttle is closed.. When you close the throttle at 60 mph the motor coasts down from 4000 rpm ,but your carb is only allowing the pilot jet to provide enough fuel to keep the motor running at 1000-1200 rpm ,thus the TEV provides the rest until the rpm drops to idle.