Suzuki2Strokes.com

Sundial Moto Sports

Suzuki Two-Stroke Message Board
Suzuki2Strokes.com
It is currently Tue Sep 25, 2018 3:56 pm

All times are UTC - 6 hours




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Starting/Idle issues
PostPosted: Sun Jan 14, 2018 3:14 pm 
Offline
On the street

Joined: Tue Nov 07, 2017 3:25 pm
Posts: 22
Country: Portugal
Bikes owned: GP125, GT380
I finally got the 380 started after a long lay off.
The first time it stated after various attempts, it idled a little high and smoked a fair amount. After warming the motor and adjusting the idle it idled pretty smoothly on all cylinders and reved quite well still smoking more than usual.
The bike was stored whilst cosmetic works continued and re-started two days later. It started at the 3 kick and again idled and smoked as mentioned above.
Again the bike was stored whilst further cosmetic works were undertaken and re-started 3 to 4 days later. Again it started up without too much of a struggle but only fired up on the left cylinder and died. It was started up again and as before only fired up on the left cylinder, but this time I played with the throttle and managed to keep the motor running. After a minute or so the right cylinder fired up followed by the centre cylinder a minute or so later. Again it smoked more than normal.
The bike runs on a Newtronic electronic ignition, K&N pod filters has new plugs and the carbs were cleaned and set.
I have read up in this forum on the SRIS valves, and when back home, will inspect and clean them. I assume sticky/non working valves to be the culprit for the excessive smoke - any comments?
Can anyone advise on what may have been the cause for it to start as mentioned above and a possible solution/further inverstigation requirements.

As Ii work away from home on only return periodically a response from me to possible solutions/further information required may take some time.

Thanks
Carlos


Top
 Profile  
 
 Post subject: Re: Starting/Idle issues
PostPosted: Sun Jan 14, 2018 3:26 pm 
Offline
Road race school

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 800
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
Drain the crankcases and see if any oil comes out. There is a drain bolt beneath each crank chamber.


Top
 Profile  
 
 Post subject: Re: Starting/Idle issues
PostPosted: Sun Jan 14, 2018 5:54 pm 
Offline
World Superbike
User avatar

Joined: Thu Feb 16, 2012 11:50 am
Posts: 2146
Location: The Republic of South Yorkshire
Country: England
Bikes owned: GT550s GT750 GSX1400 and lots of spares
Get on it and ride it for a hundred kilometers. If you keep starting it and letting it idle for a long time it WILL smoke a lot.


Top
 Profile  
 
 Post subject: Re: Starting/Idle issues
PostPosted: Sun Jan 14, 2018 6:36 pm 
Offline
Novice racer
User avatar

Joined: Wed Jan 18, 2012 8:01 pm
Posts: 930
Location: North of Albany, NY
Country: USA
Bikes owned: T500R (now), T500M (30 yrs ago)
^ This

1. The fuel:oil ratio at idle needs to be significantly less than at WOT. Yes, the oil pump has a lever that helps do this, but the ratio will always be for too much oil at idle. These motors need to be run at least mid-RPM, and fully warmed, to really start to clear things out.

2. The oil check valves, even in the best, new condition, still allow for oil to leak by over time. This oil ends up in the bottom of the cylinder/crankcase. Again, these motors need to be run at least mid-RPM, and fully warmed, to really start to clear things out.


Top
 Profile  
 
 Post subject: Re: Starting/Idle issues
PostPosted: Mon Jan 15, 2018 8:09 am 
Offline
On the street

Joined: Tue Nov 07, 2017 3:25 pm
Posts: 22
Country: Portugal
Bikes owned: GP125, GT380
Thanks to all for your valued input.
I will take it out on the road when back home and report back. I know that the oil pump lever is set as per the manual but will check and clean out the valves as well.
All the replies relate to the excessive smoking and I assume that this is not the cause for the erratic starting that I experienced. Any ideas as to what may have/is causing it?


Top
 Profile  
 
 Post subject: Re: Starting/Idle issues
PostPosted: Mon Jan 15, 2018 8:59 am 
Offline
World Superbike
User avatar

Joined: Thu Feb 16, 2012 11:50 am
Posts: 2146
Location: The Republic of South Yorkshire
Country: England
Bikes owned: GT550s GT750 GSX1400 and lots of spares
Residual oil in the cases.
It's all the same issue and needs a good run to clear it out.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 12 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Sundial Moto Sports forum © by Eric F. Kalamaja
Suzuki2Strokes.com