Suzuki 800 Intruder Club & Forum
Welcome to suzuki800 Intruder forum

A UK Site Dedicated To The Suzuki C800, VL800, VX800, VZ800, VS800, C50, M50, Intruder / Boulevard / Marauder.

You will need to register before all the area's become visible, before doing so please enter & read the first thread in the Introductory area

It will only take a minute to register & it would be great to have you on board
This is a free to access and use site.

Suzuki 800 Intruder Club & Forum

A UK Site Dedicated To The Suzuki C800, VL800, VX800, M800, VZ800, VS800, C50, M50 Model Intruder / Boulevard / Marauder
 
HomePublicationsRegisterLog in

Share | 
 

 Bike is idling at very high rpm.

Go down 
AuthorMessage
DocSjulle
Hero Globs
avatar


PostSubject: Bike is idling at very high rpm.   Thu Apr 23, 2015 8:33 pm

After driving home from a friend tonight, something weird has happened.

I accelerated hard and when it was time to slow down and turn, the bike kept up a high rpm.
The throttle feels the same, but I'm not sure if it drives right throughout the rpm range, as I was going through the city, and had to keep it in the lower gears and brake, to not go too fast.

It does about 80-90km/h in forth gear without touching the throttle.

When I got home I turned of the bike, and when starting it again it's the same high rpm.

I have the Cobra Fi controller and DIY TRE installed, but don't think these can do this. Unless the controller is throwing fuel into the engine.

Any ideas what I should check for tomorrow ?

The obvious is to check if the throttle inlet is stuck at part open, but anything else ?
Back to top Go down
simbo
* Site Guru *
avatar


PostSubject: Re: Bike is idling at very high rpm.   Thu Apr 23, 2015 8:53 pm

Check the Throttle cables, in the housing too?
Back to top Go down
Mr Intruder
Suzuki800.com Founder ... & ... Senior Administrator
avatar


PostSubject: Re: Bike is idling at very high rpm.   Thu Apr 23, 2015 8:59 pm

Yes check at the end of the cables. Could be a frayed cable possibly. Could be a dodgy TPS, unlikely. Probably a leaking vacuum issue though, are the lines on correctly try, not loose?
Back to top Go down
DocSjulle
Hero Globs
avatar


PostSubject: Re: Bike is idling at very high rpm.   Thu Apr 23, 2015 9:40 pm

Thx guys, I'll check the cables.

I have removed the pair valve and blocked the ports, what other vacuum lines are there ?
Back to top Go down
DocSjulle
Hero Globs
avatar


PostSubject: Re: Bike is idling at very high rpm.   Fri Apr 24, 2015 7:32 am

Started the bike cold, still high rpm.

Checked both cables, they are fine.

Checked the PAIR valve block off plates in the heads, they are nice and tight.

Removed the tank and could see the primary throttle valve shaft did not return all the way to the idle position.

Removed the intake snorkel and........... affraid affraid 

This is what I found 



The greedy bastard had tried to suck in the piece of foam, I used behind to cone filter in my attempt to make it a snug fit.

Now I just need to find out if blocking the secondary throttle valve, did damage to the STVA (Secondary Throttle Valve Actuator)
Back to top Go down
simbo
* Site Guru *
avatar


PostSubject: Re: Bike is idling at very high rpm.   Fri Apr 24, 2015 4:40 pm

DocSjulle wrote:

The greedy bastard had tried to suck in the piece of foam, 

  Glad you got it sorted Kim 
Back to top Go down
DocSjulle
Hero Globs
avatar


PostSubject: Re: Bike is idling at very high rpm.   Fri Apr 24, 2015 5:52 pm

I decided to check the STVA for damage by pulling it from the throttle body, and taking it apart.

To do this I had to remove the secondary throttle position sensor, and that is a bitch to put back in, but more on that later.
REMEMBER to mark the position of the STPS on the STVA, otherwise you will have to calibrate it afterwards.




We are in luck with the STVA, as it is kept together with screws and not rivets.




Another lucky thing is that it used two metal gears instead of plastic, and it was in mint condition.



Now came the hard part, installing it back in.
It is not possible to install the STVA with the STPS in place, and there is not enough room to put the screw holding it in place, after the STVA has been installed.

After I spend about 30min on this, I decided to loosen the complete throttle body.
Success, it moved the whole assembly up, allowing room to put the screw in.

Everything is back together and the bike is perfect again.
Back to top Go down
Ken1964
Valued Member
avatar


PostSubject: Re: Bike is idling at very high rpm.   Fri Apr 24, 2015 6:49 pm

Pleased to read, all is well. Must of been an extraordinary worry at first.
Back to top Go down
Mr Intruder
Suzuki800.com Founder ... & ... Senior Administrator
avatar


PostSubject: Re: Bike is idling at very high rpm.   Fri Apr 24, 2015 9:56 pm

Nice one Kim, glad your sorted.
Back to top Go down
alfie92
Very Valued VIP Member
avatar


PostSubject: Re: Bike is idling at very high rpm.   Fri Apr 24, 2015 10:04 pm

Excellent piece of work Kim, well done, and documented.
Back to top Go down
v-twin
Very Valued VIP Member
avatar


PostSubject: Re: Bike is idling at very high rpm.   Fri Apr 24, 2015 10:20 pm

Someone I know bought a non running 1978 (I think) Kawasaki 750 Triple as a non runner, it had done 4500 miles from new and still had the original tyres. Started to take the carbs off and found the foam air filter had been sucked into the carbs (mind you I think the foam had turned into powder), he sorted that out and gave it a good service and it ran like new. When he took it for its MOT he got offered 20k for it


Its very often the stupid little things that catch us out, the vacuum from a carb is stronger than you think, when I was testing my vacuum gauges I connected them up to the wifes hoover and it did not read as much as the carbs were sucking!!
Back to top Go down
OldManYam
Very Valued VIP Member
avatar


PostSubject: Re: Bike is idling at very high rpm.   Sat Apr 25, 2015 10:47 am

Nice one Kim .... glad you got it sorted & shared your findings !

Careful Andrew .... if your wife sees your test results she will be after a new 'Hoover' ......
..... or worse still borrowing your bike to do the hovering !  hyst


    Yam
Back to top Go down
stingray
Very Valued VIP Member
avatar


PostSubject: Re: Bike is idling at very high rpm.   Sat Apr 25, 2015 10:59 am

Well done Kim, excellent result and great photos and description
Back to top Go down
hawktheslayer
Very Valued VIP Member
avatar


PostSubject: Re: Bike is idling at very high rpm.   Sun Apr 26, 2015 6:36 pm

Interesting, as much as I like the idea of playing with carbs again THIS makes me sooo glad I have Fi!
Back to top Go down
Sponsored content




PostSubject: Re: Bike is idling at very high rpm.   

Back to top Go down
 
Bike is idling at very high rpm.
Back to top 
Page 1 of 1
 Similar topics
-
» Pickering High School Ball Team On THE SCORE
» Belstaff Leather Bike Jacket + Lids
» Interesting post on NERR High shool vs Prep school
» Stonnington Gift Media Release - High Class Field Set
» high hook technique

Permissions in this forum:You cannot reply to topics in this forum
Suzuki 800 Intruder Club & Forum :: The Garage :: FueI Injection Modules, Fuel, Jetting & Modifications, etc-
Jump to:  
Slide Show
A random selection of suzuki800.com member bikes.
Latest topics
» Hello from Greenock
by RodM Yesterday at 10:17 pm

» Hey Guys
by ardie Wed Dec 05, 2018 1:19 am

» Help! 99 Suzuki vz800 making clicking sound!
by peardrop3 Tue Dec 04, 2018 4:40 pm

» VS800 vs Marauder 800 carbs
by peardrop3 Tue Dec 04, 2018 4:37 pm

» Newby for RSA
by ardie Mon Dec 03, 2018 11:51 pm

» Sachs-Biker... Hello from Germany
by ardie Mon Dec 03, 2018 11:50 pm

» New to the V twin thing.....
by ardie Mon Dec 03, 2018 11:48 pm

» Hi all
by Paul53 Sun Dec 02, 2018 9:18 am

» Sachs Roadster 800
by peardrop3 Tue Nov 27, 2018 1:29 pm

» Sachs Roadster 800 porn
by adilmon Sun Nov 25, 2018 7:30 pm

» Fitment VZ800 -08 & Intruder 125cc -02
by jan1 Fri Nov 23, 2018 12:51 pm

» Greetings from Hong Kong!
by ardie Wed Nov 21, 2018 10:06 pm

» Greetings From the Holly Land!
by ardie Wed Nov 21, 2018 10:05 pm

» Metzeler tyres in M800!?
by felipemazzino Wed Nov 21, 2018 4:23 am

» Greetings and Salutations from Ontario Canada
by ardie Tue Nov 20, 2018 1:57 am

» hi all
by OldManYam Sat Nov 10, 2018 8:39 pm

» Ideas 2001 VL800
by Wiggo Sat Nov 10, 2018 5:24 pm

» Innovv K2 cameras fitted to C800
by peardrop3 Wed Nov 07, 2018 2:04 pm

» Clutch Lever Problem
by Badger Sun Nov 04, 2018 8:41 pm

» Custom Suzuki Intruder 800 by Northworks motorcycles
by onion1892 Sun Nov 04, 2018 2:15 pm

Log in
Username:
Password:
Log in automatically: 
:: I forgot my password