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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 11:36 - 17 May 2019 Post subject: |
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mpd72 wrote: | That Wemoto kit has most of the important bits so could work wonders.
The only word of caution is that I used their kits once to replace the float valves on my TZR250 race bike and they wouldn't seal up and kept pissing fuel. On inspection, the float valves are visibly shorter so never sealed. In fairness I sent a photo and they refunded me immediately.
I ended up going to Allens Performance and bought 2 sets of float valves and cup kits. Expensive but did the job.
For £25 though, it has many of the parts needed to help the carb. Just make sure you clear out all holes and passageways too.
Also, don't forget a blocked or restrictive air filter will cause it to run rich too. | OK will bear that in mind if I buy the kit
The carb has been cleaned by first bike shop already and to be fair it all looks great inside, what I've seen of it so far, so it would just be a case of replacing bits. But will obviously check it all if I end up taking it apart completely.
Air filter is standard and I've cleaned it, but it wasn't really dirty anyway. No blockages in from airbox into engine that I can see or feel (or from the air intake into the airbox from the rear).
Think plan of action is to do what I listed, then I'll order the carb kit and change the stator for good measure if I get time before the carb kit turns up. I also have a new set of genuine points so I can put them on the stator I bought from ebay before I fit it, along with the new condenser I've already soldered onto my original stator.
If none of that fixes it I am kinda stumped. Unless of course the replacement stator I've bought has exactly the same problem!
I will keep this thread updated though, because one thing I've found whilst doing my trawling is that lots of people post up problems on forums, get offered suggestions and then NEVER return to say what finally fixed it!! |
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 21:06 - 20 May 2019 Post subject: |
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evening all....
Just thought I'd popst an update from the work over weekend.
Swapped to a lower main jet, which made no difference whatsoever, so I have put the original main jet back in. Took exhaust off and checked it and I am pretty sure there is no blockage.
I'm going to have to bite the bullet and change the stator plate and see if that is my issue I think.
Aside from that I guess I'll need to look deeper and do a compression test to check for worn rings or worse
Does anyone have anything good to say about the "budget" compression testers you can buy from ebay or amazon? |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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redeem ouzzer |
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redeem ouzzer World Chat Champion
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Steve_W |
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Steve_W Two Stroke Sniffer
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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Posted: 22:28 - 20 May 2019 Post subject: |
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Steve_W wrote: | from what I can gather, it has fixed timing, no advance/retard.
The points and ignition coil, again from what I can work out and from reading the manual with my (very limited) mechanical knowledge is that the stator has two coils, one for the lights (headlight and tail light only work when engine is running) and the other is for charging the battery and I assume providing power to the points, ignition coil etc? The battery isn't needed for the bike to run, all the battery does is power brake light, indicators, neutral light and horn (I think).
Could it be this "charging" coil breaking down under load? |
No, if it were breaking down under load it'll be when it's hot, not at a given trottle position. ____________________ trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050 |
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 23:02 - 20 May 2019 Post subject: |
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How hot is "hot" before it's likely to start breaking down?
I only ask because when I changed the main jet at the weekend and took it for a quick run, I initially thought I had fixed it because it felt like it was pulling better as I set off, but as soon as I got off my estate and onto the main road it was being a twat again |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Sister Sledge |
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Sister Sledge World Chat Champion
Joined: 17 Aug 2018 Karma :
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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Steve_W |
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Steve_W Two Stroke Sniffer
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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Posted: 12:18 - 21 May 2019 Post subject: |
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Steve_W wrote: | The points are not new, when I took the bike in for the carb to be cleaned, they also checked the timing and said it was spot on.
As mentioned, they are not new points, but Bike shop said "they're OK" and the way he said OK I interpreted it to be "not completely buggered but not in A1 condition".
I do have a new set of Genuine Suzuki points that I was going to fit to the used stator I have bought and was also going to fit the new condenser I bought that is currently on my existing stator.
Nobby, not sure what you mean about points being in correct position if the timing has been confirmed as OK? |
Worteh changing. I had an issue with my A100 which I believe was points related. Due to wear on the cam follower part I couldn't set the gap correctly which had an impact on timing I believe. The contacts looked fine BUT that's not the only part that can degrade. ____________________ Now: A100, GT250A, XJ598, FZ750
Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600 |
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 13:35 - 21 May 2019 Post subject: |
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I think I might change the points but leave the original stator in there for now?
I've also ordered a carburettor repair kit, which means I can eliminate a worn jet needle etc as well.
I probably won't have much time to do this until the weekend, but will update as and when I do each thing with my results.
Once again, thanks for all your help you lovely people |
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Sister Sledge |
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Sister Sledge World Chat Champion
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Steve_W |
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Steve_W Two Stroke Sniffer
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Posted: 17:02 - 21 May 2019 Post subject: |
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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Sister Sledge |
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Sister Sledge World Chat Champion
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 08:44 - 23 May 2019 Post subject: |
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first thing I bought when I realised I had a problem that could be electrical was the right size flywheel puller
The hardest part of removing the magneto flywheel when we changed the condenser was undoing the nut that holds it on! Using the flywheel puller made removing the flywheel a piece of cake |
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 15:09 - 09 Jun 2019 Post subject: |
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Quick update on this as I'm still suffering the same problems, although maybe my initial description could have been a bit misleading as it's not exactly correct......
I have now replaced all electrical parts of the ingition:-
ignition coil and HT lead
replaced stator with used ebay purchase
new condenser
new genuine Suzuki points
new spark plug ( I've bought 4 more so once it's finally running properly I can do plug chops to ensure mixture is correct etc.)
Compression tested and that seems absolutely fine.
Exhaust is not blocked as far as I can tell.
Timing is set correctly to 1.87mm BTDC (used a gauge to find TDC and 1.87mm before TDC) and proved points opening at correct time with multimeter. Points gapped correctly also.
Took bike out for short run. picks up niceley at 1/3 throttle and will rev all the way up the rev range as far as I could until the road ran out!
As soon as I open throttle much more than that when trying to accelerate it dies (bogs?) as it always has done.
So.......
I took air filter out and ran it up the road (each "test" run was only around a mile to avoid causing damage due to being too lean etc). No difference.
Took airbox off completely and ran it. Was improved but not 100%.
Took carb cover off and ran it up the road. Massive difference. Pulled all the way to 8k before it started to struggle - I'm guessing due to it then being too lean at that point due to TOO much air?
So I think this kind of proves to me that it has to be fuel related after all, and that it is far too rich at certain points in the rev range? |
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 15:16 - 09 Jun 2019 Post subject: |
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I have a carburetor repair kit that I bought from wemoto, so I am going to start looking at doing that next, but take a look at the needle that is supplied in the kit compared to the one that is currently on the bike......
https://i.ibb.co/sHzRvYJ/jet-needles.jpg
Now either the original (on the left) is VERY worn, or the new one (on the right) is fecking massive!!!!
I might just try moving the clip up each notch on original needle first as it's a quick easy job, just to see if it helps. it's in the middle at the moment, so I can lean it off by two notches on original needle anyway. Guess it's worth a try, |
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 22:17 - 09 Jun 2019 Post subject: |
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There's no emulsion tube in the kit, so I guess that needle is next to useless for me really
This is what came in the kit:-
https://i.ibb.co/wh17WrP/carb-kit.jpg
I am going to have a play with the original needle first anyway, just to see if that makes any difference, but failing that I guess I'll need to try and find an original needle from somewhere.
There are actually a couple of old threads on BCF with people having exactly the same issue as I am having, also with GP100s, but annoyingly there is no resolution!
Buy an old bike they said, it'll be fun they said...... |
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- Super Spammer
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Steve_W |
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Steve_W Two Stroke Sniffer
Joined: 14 May 2019 Karma :
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Posted: 10:23 - 10 Jun 2019 Post subject: |
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Old Thread Alert!
The last post was made 4 years, 315 days ago. Instead of replying here, would creating a new thread be more useful? |
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