2000 SV650 Choke plunger kit - Is it worth it?

[rw1968]

My 2000 SV650S has been messing me about recently. I did a carb rebuild a few weeks ago and it's not been happy since.
It pops and splutters on overrun, and acceleration with moderate throttle opening is very lumpy.
I took it apart again at the weekend and put a lot of time & effort into making sure that the choke plungers are seated correctly in the carb bodies and O rings are in good nick.
It's now better, but still not happy.
This weekend I'll be searching hard for air leaks or anything else suspicious, but I'm still concerned about the choke.
Starting from cold with even a little bit of choke makes it rev to around 4 or 5 grand.
Having convinced myself that the choke is at least some of my problem, I was wondering if anyone had tried the All Balls choke plunger kits you can buy on ebay.
£50 seems a lot for a couple of springs and a few pieces of brass - but has anyone on here tried one and are they any good?

[garynortheast]

Welcome to the Org.

Can't comment on the choke plunger kit, but it may be worth taking a look at the vacuum take off pipes to make sure they are properly sealing.

[admin]

Possibly an air leak. Some of your rubber items are 25 years old?

[Sir Trev]

You've checked the plungers but have you checked the cable? That is well known for sticking and could be your problem. Easy to check and a simple(ish) fix for not a lot of cash.

[rw1968]

Hi - thanks for all your replies.
I have checked the cable - it doesn't stick anywhere and with the plungers removed from the carb bodies they move smoothly in and out without binding so I'm pretty confident in it.
I like the idea of just replacing the rubber bits anyway due to their age so thanks for the suggestion. Looking through the garage yesterday after work, I have plenty of appropriate sized fuel pipe so I might as well replace them. The only thing I'm concerned about are the little right angled moulded bits of pipe where the pipe splits and meets the carbs. I'm not quite sure that the pipe I have will play nicely with that small a radius of curvature.
Any ideas where I can get those bits in the UK? I can't seem to find anything on the internet.
Anyway - thanks again for your suggestions.


Cheers!

[admin]

Originally Posted by rw1968

Hi - thanks for all your replies.
I have checked the cable - it doesn't stick anywhere and with the plungers removed from the carb bodies they move smoothly in and out without binding so I'm pretty confident in it.
I like the idea of just replacing the rubber bits anyway due to their age so thanks for the suggestion. Looking through the garage yesterday after work, I have plenty of appropriate sized fuel pipe so I might as well replace them. The only thing I'm concerned about are the little right angled moulded bits of pipe where the pipe splits and meets the carbs. I'm not quite sure that the pipe I have will play nicely with that small a radius of curvature.
Any ideas where I can get those bits in the UK? I can't seem to find anything on the internet.
Anyway - thanks again for your suggestions.


Cheers!

Check eBay. Don't search for sv specific items though. You might find something that's close enough to do the job

[rw1968]

Again - Thanks for your replies.
The latest information is that I borrowed a thermal camera from work.
When idling with no choke a few minutes after starting - so just warm enough to run without the choke, the front header is at around 60 degrees whereas the rear is around 160 degrees.
I'd expect the front to be a bit cooler as its in free-ish air - but certainly not that much.
I'm still convinced its carbs causing the issue - because that's what I messed around with before it went wrong.
Looks like the front cylinder it not playing nicely - any suggestions for any specifics to look at?


Cheers,


Richard.

[rw1968]

Right - time to fess up.
Just because I've soaked it it carb cleaner and blown it through with the air line doesn't actually mean that the pilot jet is clear.
I have _properly_ cleaned it now and normal service has been resumed.
Thanks again for all your help.
Important conclusions are:
1. I am still going to replace all the rubber bits because I think it's just a good idea.
2. Given that nobody here seems to have spent the £50 on one of those All Balls choke plunger kits I guess its not worth it
3. If I say that I have cleaned something can one of you please say "Are you sure?"

[garynortheast]

Originally Posted by rw1968

3. If I say that I have cleaned something can one of you please say "Are you sure?"

Ha ha! You're assuming that we all also make a good job of our maintenance tasks!

Really pleased you have it sorted. Definitely a good move replacing the rubber bits while you have the carbs off and in bits.

[redtrummy]

To be honest I had about the same problem. I had no thermal camera but found a hand was a good indicator of exhaust temperature (if a little painful!) Also running a load of Redex through and then letting it stand for a couple of days can be quite effective. I think getting those carbs off a bit of a nightmare and managing to replace all the pipes and bits a second problem to overcome when putting it back together.