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Post by headcoats on Aug 22, 2019 19:53:45 GMT 1
Had a look tonight and it looks like I'm about 12mm too short for the slides to shut !
I think last time I carefully cut the hexagons down on the 2 bottom throttle cables but is there another way ?
Got the carbs with the swan neck tops which are quite long I guess but that is what I used last time (but now worried the threads don't run all the way down the hexagons )
Hexagons were screwed right down on the threads of the swan necks and on the throttle side , it was turned right in |
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Post by steeley on Aug 22, 2019 20:19:50 GMT 1
Hi, when I have fitted different carbs I have ended up making new inners on the short sections to the carbs . 9 times out of 10 when you have made them they still need some fine adjustment. Get some inner cable from a push bike shop and some small nipples and solder them on with some lead free solder .
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Post by jessy03 on Aug 22, 2019 20:52:34 GMT 1
Fit some 45 degree bends  |
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Post by headcoats on Aug 22, 2019 21:03:37 GMT 1
I have the bends so need to either lengthen cables like Steeley said or shorten the hexagons
Or get rid of the bends then maybe give the length back !
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Post by midlifecrisisrd on Aug 22, 2019 22:45:30 GMT 1
Use a pair of the 45 degree elbows from norbo and file the lock nuts to half distance
You can also cut your long elbows and cut a new m6 x 0.75 thread
Steve
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Post by tacky1 on Aug 22, 2019 23:36:15 GMT 1
I fit the 45 deg bends and grind the top of the cap down flush where the bend tightens in and the lock nut tightens up, That way works for me,
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Post by JonW on Aug 23, 2019 4:56:53 GMT 1
you can cut the threads a little more on the bends as well, every little helps.
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Post by jessy03 on Aug 23, 2019 8:51:04 GMT 1
If you split the cable, take 2/3mm off the bottom of the cable holder you can run bigger carbs, I’m on 32mm’s  |
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Post by headcoats on Aug 23, 2019 11:56:45 GMT 1
The hexagon adjusters (on the 2 bottom cables) have 20mm of inside thread
The angled tops on the carbs have 10mm of thread but must include the half nut
I need to lose at least 12mm
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Post by jessy03 on Aug 23, 2019 15:21:32 GMT 1
Seems to work ok on mine, bit strange   |
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Post by midlifecrisisrd on Aug 23, 2019 15:27:37 GMT 1
Seems to work ok on mine, bit strange Was fine with those tops on mine too. He must have different set of elbows Steve |
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Post by headcoats on Aug 23, 2019 15:40:24 GMT 1
Yes mine are supposed to be the proper Keihin carb tops with fixed in elbows and look longer to yours
I think I would rather buy some more angled carb connectors like yours than chop the hexs !
Like these
www.splatshop.co.uk/sherco-carb-top-keihin.html
I do have a tap and die kit to put some more thread on ? |
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Post by jessy03 on Aug 23, 2019 15:46:15 GMT 1
The keihin ones are longer, I had some a few years back I ended up cutting 5-10mm off the long hex adjuster.
Just buy a pair off Norbo, no mucking about.
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Post by midlifecrisisrd on Aug 23, 2019 16:02:45 GMT 1
Remember it's not a standard thread but m6 fine
Steve
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Post by bare on Aug 24, 2019 3:08:49 GMT 1
I discovered that 28MM Pwks on a Valvie in an LC frame gave better Throttle cable control WITHOUT! the goofy metal carb top angled tubes.
Cleaner smoother throttle action resulted from simply allowing the throttle cables to gently curve into the PWKS.
Internet wisdom is ...Always... subject to trial and error proof !
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Post by headcoats on Aug 25, 2019 21:31:42 GMT 1
I have chopped the hexagons down about 12mm in the end, 10mm like I think Jessey said would have done it but didn't want to do it twice!
Cost nothing so better option LOL
Got to decide what pod filters now
PWK 28's have 48.5mm OD for clamping and could squeeze something in about 125mm long but would need to be the squashy foam type
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Post by dusty350 on Aug 26, 2019 8:15:08 GMT 1
I like the look of the Uni filters. I emailed them in the states during the week regards UK stockists but never received a reply☹ They do filters with a 15 degree angle at the clamp so you can fit them pointing in towards the centre of the bike to miss the frame tubes. There are sellers on ebay uk though so you could try them. Mutts sells filters too but I'm not sure which make.
Dusty
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Post by headcoats on Aug 26, 2019 9:35:07 GMT 1
I emailed Ramair in desperation LOL
I remember years a go they said they could do the filters longer (they call it height) , so asked them about the 48mm I.D. and 125mm long
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Post by midlifecrisisrd on Aug 26, 2019 10:45:29 GMT 1
Think you are over complicating things Just buy the 48mm filters. It's what I fitted Steve   |
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Post by headcoats on Aug 26, 2019 10:55:50 GMT 1
How long are they though Steve ?
Found the battery box is the limiting factor the further you go back
120mm might have to be maximum ?
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Post by wallcraft on Aug 26, 2019 12:12:25 GMT 1
If you are running pwks on rubber inlets you will have more than enough room for the filters that Steve says, on my 421 I'm using a-billet inlet which moves the carbs even further back with mikuni 34s which again are bigger in size than your 28s with the above Ramairs. They foul the side rails slightly and just touch the airbox and oil tank and just touches the shock spring. Any other filter and it would be game over unless you use a K&N cone type which we all know throws up other issues.
Mark.
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Post by JonW on Aug 26, 2019 13:34:43 GMT 1
I use the Uni Filters on my 421 with 34s/billet x-over. Nice filters.
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Post by headcoats on Aug 26, 2019 13:55:00 GMT 1
Norbo needs to import some !
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Post by midlifecrisisrd on Aug 26, 2019 16:14:21 GMT 1
How long are they though Steve ? Found the battery box is the limiting factor the further you go back 120mm might have to be maximum ? As per the spec sheet they are 91mm Steve  |
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Post by headcoats on Aug 27, 2019 8:56:34 GMT 1
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Post by headcoats on Aug 27, 2019 14:11:39 GMT 1
Ramair have got back and they will make them longer as a custom fit
Price they said is £18.68 each plus additional 30% fee for a custom fit
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Post by midlifecrisisrd on Aug 27, 2019 14:13:30 GMT 1
Ramair have got back and they will make them longer as a custom fit Price they said is £18.68 each plus additional 30% fee for a custom fit Just be aware if you but them up against a flat surface you may do the same as the chrome end k&n's and disturb air flow I'd rather have a gap behind Steve |
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Post by markg64 on Apr 28, 2020 18:24:13 GMT 1
Seems to work ok on mine, bit strange Was fine with those tops on mine too. He must have different set of elbows Steve Hi steve, norbos 45 degree ends are NLA now. Any idea where i could get some ? Mark |
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Post by headcoats on Apr 28, 2020 18:28:31 GMT 1
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Post by jessy03 on Apr 28, 2020 18:36:57 GMT 1
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