SV650.org - SV650 & Gladius 650 Forum



SV Talk, Tuning & Tweaking Discussion and chat on all topics and technical stuff related to the SV650 and SV1000
Need Help: Try Searching before posting

Reply
 
Thread Tools
Old 22-10-09, 04:11 PM   #1
Nick8529
Guest
 
Posts: n/a
Default running problem - as if running out of petrol

Hi,

I have been having a bit of problem with my bike. It has been running with really low revs an is really jerky as if it is running out of petrol but there is plenty petrol in. The engine sounds really rough and is shaking alot. I had to have the throttle open quite far and every so often it will suddenly go back to normal and because i had the throttle open far it would suddenly shoot off. Then the revs would drop back down again and would die if i didnt keep the revs up.

I have got no idea what is wrong. at first i thought it could be out of oil but there is loads of oil. When this happened it was raining quite heavily so i thought that might have something to do with it but it is dry now and it still has the problem.

Thats all my ideas so if anyone could tell me what the problem could be and if i can fix it fairly simply as i dont have much knowledge about bikes that would be great!
  Reply With Quote
Old 22-10-09, 04:16 PM   #2
starks
Guest
 
Posts: n/a
Default Re: running problem - as if running out of petrol

im having a similar problem at the mo pal, dont know wat it is yet sorry but when i find out i'll be able to give you a heads up to what it could possibly be
  Reply With Quote
Old 22-10-09, 04:16 PM   #3
monkimagic
Member
 
monkimagic's Avatar
 
Join Date: Sep 2009
Location: no where
Posts: 167
Default Re: running problem - as if running out of petrol

sounds like a trapped vaccum hose, have you had the tank off or poked about under there lately.

or a fuel feed problem

or
monkimagic is offline   Reply With Quote
Old 22-10-09, 04:19 PM   #4
Scoobs
Vipers Pillion Bitch
Mega Poster
 
Scoobs's Avatar
 
Join Date: Jul 2003
Location: Waterlooville
Posts: 3,933
Default Re: running problem - as if running out of petrol

....or water in the fuel.
__________________
I look good, I mean really good! Hey everyone come and see how good I look!

Scoobs is offline   Reply With Quote
Old 22-10-09, 04:21 PM   #5
Nick8529
Guest
 
Posts: n/a
Default Re: running problem - as if running out of petrol

I had a look under when the problem started but not for a while before the probelm.

Anything i can do if there is water in the fuel? or am i going to have to run it till its dry and refill it?
  Reply With Quote
Old 22-10-09, 04:30 PM   #6
maviczap
Member
Mega Poster
 
maviczap's Avatar
 
Join Date: Mar 2007
Posts: 9,096
Default Re: running problem - as if running out of petrol

Make surec that the drain hole under the filler cap is clear so that if it is raining hard water isn't getting into the tank via this blocked drain. Think it's a problem on some curvy's.

Make sure its not the front spark plug getting wet either, as mine was a bit like this before in the wet. Cured with a fenda extender & a bit of silcon grease round the front plug cap. WD40 on the spark plug & make sure the drain on the front cyclinder is clear as well, otherwise the water can't get out

And you could check to make sure that all the vacum & petrol pipes haven't perished and letting a tiny amount of air in somewhere. I had a car do this to me once

Do the spark plug first, as this is a common problem on Sv's in the wet for some, but not all
__________________
We're riding out tonight to case the promised land
Make everyday count
RIP Reeder - Jolly Green Giant and comedy genius

Last edited by maviczap; 22-10-09 at 04:31 PM.
maviczap is offline   Reply With Quote
Old 22-10-09, 04:35 PM   #7
Nick8529
Guest
 
Posts: n/a
Default Re: running problem - as if running out of petrol

If it was the spark plug would it not work fine when it was dry?
  Reply With Quote
Old 22-10-09, 04:38 PM   #8
yorkie_chris
Noisy Git
Mega Poster
 
yorkie_chris's Avatar
 
Join Date: Apr 2007
Location: Halifax/Leeds
Posts: 26,645
Default Re: running problem - as if running out of petrol

Wet front plug I reckon.

Water takes a while to dissipate.
__________________
Currently Ex Biker
Now rebuilding a 63' fishing trawler as a dive boat
yorkie_chris is offline   Reply With Quote
Old 22-10-09, 04:39 PM   #9
maviczap
Member
Mega Poster
 
maviczap's Avatar
 
Join Date: Mar 2007
Posts: 9,096
Default Re: running problem - as if running out of petrol

Not if the drain hole is blocked and the spark plug is still damp. Mine took ages to get back to normal, even though I'd sprayed loads of WD on the plug cap & spark plug
__________________
We're riding out tonight to case the promised land
Make everyday count
RIP Reeder - Jolly Green Giant and comedy genius
maviczap is offline   Reply With Quote
Old 22-10-09, 04:39 PM   #10
maviczap
Member
Mega Poster
 
maviczap's Avatar
 
Join Date: Mar 2007
Posts: 9,096
Default Re: running problem - as if running out of petrol

Quote:
Originally Posted by yorkie_chris View Post
Wet front plug I reckon.

Water takes a while to dissipate.
Thanks YC +1
__________________
We're riding out tonight to case the promised land
Make everyday count
RIP Reeder - Jolly Green Giant and comedy genius
maviczap is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
sv running problem? any ideas Crunchy SV Talk, Tuning & Tweaking 6 31-07-09 04:27 PM
Not Starting after running out of petrol. gerbrox Bikes - Talk & Issues 4 15-08-08 10:52 AM
And you thought running out of oil was a problem... gettin2dizzy Idle Banter 22 11-06-08 08:04 PM
Odd choke/running problem northwind SV Talk, Tuning & Tweaking 13 07-06-05 11:46 AM
Starting /rough running problem Sholay SV Talk, Tuning & Tweaking 5 26-01-05 04:18 PM


All times are GMT. The time now is 03:26 AM.


Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.