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Post by abar121 on Sept 8, 2022 15:53:08 GMT 1
Get original jets from Allens.
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Post by vectisitch on Sept 8, 2022 16:17:46 GMT 1
Put all the internals from your mates carbs in your carb bodies as it ran well with those. If still shit then surely the carb bodies are worn.
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Post by 4l04ever on Sept 8, 2022 20:53:02 GMT 1
It sounds like the emulsion tubes may be after market if they are not marked. Could you borrow your mates removable parts and fit them in your bodies? If that works, then swap the bits back one at a time until you find the cause.
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Post by shaunthe2nd on Sept 8, 2022 21:12:48 GMT 1
We feel your pain. Your comments/tests are eliminating things though.
It appears to either be the emulsion tubes or the jets. Either swap parts with your mates or buy gen mikuni and try again.
If that doesn't sort it, then I agree, some problem with the carb bodies or internal passageways that aren't clear.
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Post by lcstevie on Sept 9, 2022 17:12:07 GMT 1
From comments above, before you spend on parts, I would suggest checking the float heights and that the needle jet that sets the height is seated correct and seal around the needle jet housing is ok. Maybe causing fuel starvation if incorrect. Whilst at it have another look at the emulsions, if you give them a clean you should see the faint stampings on them giving the ref number. Try swapping the choke plunger as suggested. If still no luck, I'd be buying gen mikuni jets, mains and pilots and trying them. Have ordered mains, pilots, tubes, needles and choke plunger from the shop on here.. Will post what happens....
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Post by keith101 on Sept 9, 2022 21:03:18 GMT 1
Hi I fitted Chinese copy pwk carbs, only changed jets, needles etc to suit my engine tune and they have been brilliant. I'm sure there will be voices of doom on here concerning that choice but I had tried to buy from a well known Web site along with a number of other parts but the response was such that I gave up and looked elsewhere. If your not worried about standard then from my experience it's worth a go. Good luck
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Post by lcstevie on Sept 10, 2022 9:37:35 GMT 1
just found out that my mates carbs (the ones that work) are 4L2-00 carbs. FFS Anyone know what the difference is.
DAMN IT. I wanna go to Blue Haze day at the ace cafe tomorrow....
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Post by lcstevie on Sept 10, 2022 10:30:17 GMT 1
Hi I fitted Chinese copy pwk carbs, only changed jets, needles etc to suit my engine tune and they have been brilliant. I'm sure there will be voices of doom on here concerning that choice but I had tried to buy from a well known Web site along with a number of other parts but the response was such that I gave up and looked elsewhere. If your not worried about standard then from my experience it's worth a go. Good luck where did you get them and were they autolube ones
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Post by steve63 on Sept 10, 2022 11:37:33 GMT 1
Are these non genuine kits so bad that they alone make the bike virtually un rideable?
Is that the general opinion?
If so how can they be so bad?
My cousin brought his 350LC to me complaining that it won't ride properly. Something about it bogging in big throttle openings. Said it was like it was on choke. It was a long long time ago.
Anyway, stripped the carbs and there were no main jets in it. I kid you not. He rode it to my house though.
My lads ZY125 had no airscrew in it but it still went. I can't remember how well as we had just bought it and he never went on track with it like that but it did run. I robbed an airscrew out of my KR1 carb and it stayed like that for about 4/5 years until it was stolen.
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Post by shaunthe2nd on Sept 10, 2022 11:59:46 GMT 1
4L2 carbs were fitted to German restricted 250s along with 4L2 pipes.
I would stick with your 4L0-01s and fitting genuine brass ware and settings as your start point.
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Post by lcstevie on Sept 10, 2022 12:05:13 GMT 1
Are these non genuine kits so bad that they alone make the bike virtually un rideable? Is that the general opinion? If so how can they be so bad? My cousin brought his 350LC to me complaining that it won't ride properly. Something about it bogging in big throttle openings. Said it was like it was on choke. It was a long long time ago. Anyway, stripped the carbs and there were no main jets in it. I kid you not. He rode it to my house though. My lads ZY125 had no airscrew in it but it still went. I can't remember how well as we had just bought it and he never went on track with it like that but it did run. I robbed an airscrew out of my KR1 carb and it stayed like that for about 4/5 years until it was stolen. im starting to think that it is the bodies them selves. I have changed everything apart from the emulsion tubes with the correct 5K1 needles. These are in the post to me at the moment but im not holding much hope its gonna sort it. Was wondering if other brass balls need to be popped for cleaning apart from the big ones which Ive already done. Ive noticed on my mates carb that the small brass ball next to the large one has been out at some stage.
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Post by lcstevie on Sept 10, 2022 14:46:21 GMT 1
Update Micuni Part came today. Fitted new Needle, Emulsion tubes, Idle jet, Main jet and new choke plunger. Still no joy. Splutters like its running on choke. Fitted my mates choke side carb with my right hand carb and it ran shit. Put both my mates carbs and it ran Great. Fitted my choke side carb and my mates Right hand carb and it ran great. This is telling me its my right hand side carb.
I think there must be something wrong with the body of the right hand carb.
HEEEEELLLLLPPPPPPP AHHHHGGGG gonna put a match to it soon.
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Post by shaunthe2nd on Sept 10, 2022 14:55:43 GMT 1
I admire your persistence. At least you are eliminating some things. I will check my stash when I'm home tomorrow in case I have a 4L0-01 rh body. Im sure I have a pair of 4L2 bodies kicking around if you want to try matching Yr mates set up with your internals.
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Post by 4l04ever on Sept 11, 2022 7:24:26 GMT 1
Well done with the work so far. At least you are narrowing the issue down each time.
Try comparing the two right hand carbs more closely. Try blowing through each passageway on the good carb then check the same one on the bade carb, and see if they are the same.
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Post by vectisitch on Sept 11, 2022 8:42:17 GMT 1
Kill your mate and keep his carbs. LClife
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Post by lcstevie on Sept 11, 2022 16:46:00 GMT 1
Well done with the work so far. At least you are narrowing the issue down each time. Try comparing the two right hand carbs more closely. Try blowing through each passageway on the good carb then check the same one on the bade carb, and see if they are the same. Have tried this many times now, just cant see whats wrong..Suspecting the body has gone pourus. I have bought a second hand pair of of ebay and hoping the right hand one is not the same. Fingers crossed and all that....
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Post by lcstevie on Sept 11, 2022 16:50:27 GMT 1
I admire your persistence. At least you are eliminating some things. I will check my stash when I'm home tomorrow in case I have a 4L0-01 rh body. Im sure I have a pair of 4L2 bodies kicking around if you want to try matching Yr mates set up with your internals. Oh no.... have just got back from the Blue haze day at the Ace cafe and just seen this post... While I was up there I purchased a second hand pair of 4l0-01 off of ebay. I do appreciate the offer and thanks. I might take you up on that if the pair I have purchased turn out to be duff..
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Post by lcstevie on Sept 13, 2022 19:19:52 GMT 1
Whilst setting them up, turning the mixture screw doesnt alter the revs much at all. I thought you alter these to get the fastest engine tick over and the adjust the idle to bring the engine speed down. As per the Ha Ha Haynes manual.
Oh someone please help....
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Post by muttsnuts on Sept 13, 2022 19:32:43 GMT 1
unfortunately you might have bought another knackered RHS carb, as I said on the phone the other day I've had a good number through the door, when I've fixed it for customers, I always give them their old parts back, unfortunately some people are a little unscruplous and sell then on ebay, knowing the RHS is knackered.
Ones that I've swapped recently, I've started marking them so that I know the carb has been condemend, so if it comes in on another bike I know pretty much straight away, so far I've had 2 back in over the last 6 months, thankfully, both customers where happy for me to destroy those carbs as they had done the exact same thing as you, bought some thinking it would fix the issue
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Post by lcstevie on Sept 13, 2022 19:57:56 GMT 1
unfortunately you might have bought another knackered RHS carb, as I said on the phone the other day I've had a good number through the door, when I've fixed it for customers, I always give them their old parts back, unfortunately some people are a little unscruplous and sell then on ebay, knowing the RHS is knackered. Ones that I've swapped recently, I've started marking them so that I know the carb has been condemend, so if it comes in on another bike I know pretty much straight away, so far I've had 2 back in over the last 6 months, thankfully, both customers where happy for me to destroy those carbs as they had done the exact same thing as you, bought some thinking it would fix the issue What mark did you go upon them and I’ll check. They will go back and I’ll get my money back using the eBay money back guarantee. Would love to get the bike to you to sorta d tune but you are miles away from the m me. ☹️
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Post by muttsnuts on Sept 13, 2022 20:02:04 GMT 1
I put my initials on the inside of the carb body (float bowl area)
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Post by lcstevie on Sept 13, 2022 20:16:43 GMT 1
I put my initials on the inside of the carb body (float bowl area) Was this on the RH body only
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Post by abar121 on Sept 13, 2022 20:26:48 GMT 1
You can always try the LH on the RH side. Block up the choke circuit or loop it round. Not really if that's going to help though.
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Post by muttsnuts on Sept 13, 2022 20:32:12 GMT 1
I put my initials on the inside of the carb body (float bowl area) Was this on the RH body only yes, only swap and therefore mark the dodgy carb
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Post by lcstevie on Sept 13, 2022 20:59:20 GMT 1
Was this on the RH body only yes, only swap and therefore mark the dodgy carb no marks apart from like 5 centre punch marks in a row. Am i right in thinking it has to be the bodies if the working carb (4l2) has the same jet set up. Float heights are set to 21mm, new needles 5K1 set to the middle, new needlejets, new mains 220 and new pilot 22.5 all mikuni. Would you need the bike if you supplied a set of 250 bodies and set em up for a 350 ?
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Post by billbott on Sept 13, 2022 21:10:28 GMT 1
I have a pair of 4L2 bodies you can try? Whereabouts are you - if you’re local to Bolton you can collect, try and see how they are?
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Post by lcstevie on Sept 13, 2022 21:24:33 GMT 1
I have a pair of 4L2 bodies you can try? Whereabouts are you - if you’re local to Bolton you can collect, try and see how they are? Thanks a lot I do appreciate the offer. Im in chessington, Surrey and nowhere near you. Someone who lives close to me has kindly messaged me with an offer to loan some and I can try them. But again thanks for the offer
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Post by billbott on Sept 14, 2022 0:08:47 GMT 1
I have a pair of 4L2 bodies you can try? Whereabouts are you - if you’re local to Bolton you can collect, try and see how they are? Thanks a lot I do appreciate the offer. Im in chessington, Surrey and nowhere near you. Someone who lives close to me has kindly messaged me with an offer to loan some and I can try them. But again thanks for the offer No worries, hope you get sorted. If the loan set work out and you want a set to keep let me know👍
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Post by lcstevie on Sept 14, 2022 7:11:36 GMT 1
Thanks a lot I do appreciate the offer. Im in chessington, Surrey and nowhere near you. Someone who lives close to me has kindly messaged me with an offer to loan some and I can try them. But again thanks for the offer No worries, hope you get sorted. If the loan set work out and you want a set to keep let me know👍 Thank you very much 👍
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Post by lcstevie on Sept 22, 2022 20:13:32 GMT 1
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