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Post by lcmarky on Aug 4, 2020 21:35:45 GMT 1
Gotta love all the know how on here!!
Cheers folks.
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Post by midlifecrisisrd on Aug 4, 2020 21:47:53 GMT 1
The other benefit of the cable operated choke is you get more options than on or off
Mine used to rev it's t1ts off with both chokes pulled
Now 3/4 to start then back off to half
You can also keep a whiff on for pulling away
Steve
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Post by JonW on Aug 5, 2020 0:21:49 GMT 1
I did the cable choke on my PWKs on my F1 as well. XJ (750 i think) parts screwed to the bottom of the F1 switchgear and TZR choke cables with a splitter i had laying around. Beware tho that the insides of some of those indicator switches are not always the same as ours, some have a tang and sit a bit more angled. The bodies might look the same externally but are not exact matches. Much simpler to swap the wiring of just the choke mech, but its hard to pass up the spare switches and housing when theyre in your boxes lol.
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Post by bare on Aug 5, 2020 17:01:22 GMT 1
I fretted over a choke setup when I installed My Keihins. A nuisance to fit cleanly. Finally decided to try without any choke cobble up. Thinking I could lift both chokes by hand IF needed. Turns out I don't Need to use the Choke(s)..at all . Although not tried when there is frost about. 130 mains 40 airs JJH needles. It runs a bit rich... intentionally
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Post by veg on Aug 5, 2020 17:07:19 GMT 1
Just seen this I have 34mm I drilled the body just after the slides but mine are cast with a place for that to be done. Choke wise I use manual levers on both once it starts I flick them off takes a matter of moments the warm it by blipping the throttle.
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Post by jon on Aug 5, 2020 19:16:27 GMT 1
Am I going mad, or did someone post on this thread you can get 70hp from standard carbs, but the PWKs will give more mid range?
Maybe another post? Edit - just seen it on confused.com thread.
I’ve been thinking about PWK 28s for a tuned YPVS. V force 4 reeds too, or maybe just the reeds to save the hassle of trying to jet and put oil lines in?
Jon
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Post by midlifecrisisrd on Aug 5, 2020 20:09:16 GMT 1
Am I going mad, or did someone post on this thread you can get 70hp from standard carbs, but the PWKs will give more mid range? Maybe another post? Edit - just seen it on confused.com thread. I’ve been thinking about PWK 28s for a tuned YPVS. V force 4 reeds too, or maybe just the reeds to save the hassle of trying to jet and put oil lines in? Jon It was ianboom's LC Mick Abbey tune, Zeel, TSA pipes, 26mm Mikuni's, v force reeds and modded airbox from memory It did 71hp Remember the power figure as when I took my 385 for its first dyno run with a finger in the air ignition map, the fuelling wrong and no v force reeds the dyno guy asked what I was hoping for As Ian's had done 71 I said at least 72 He looked a bit smug and said I'd be lucky, the last 350 ypvs he run up did 45 That smug look dissapeared when it did 73 😁 Steve
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Post by lcmarky on Aug 6, 2020 13:31:25 GMT 1
I fretted over a choke setup when I installed My Keihins. A nuisance to fit cleanly. Finally decided to try without any choke cobble up. Thinking I could lift both chokes by hand IF needed. Turns out I don't Need to use the Choke(s)..at all . Although not tried when there is frost about. 130 mains 40 airs JJH needles. It runs a bit rich... intentionally Great info thank you. Double checking these are for the Keihin PWK 28's?
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Post by lcmarky on Aug 6, 2020 13:33:50 GMT 1
What do you folks think my spec' may make BHP wise:
400cc Liners, pistons etc Reprofiled head PWK 28s & air socks Nikkon F2 pipes & TZ Cans Vape Power Dynamo Ignition Ignitech programmable ignition
Cheers
Mark
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Post by Dieseldog on Aug 6, 2020 15:34:52 GMT 1
I used a mountain bike suspension lock out lever (Suntour Lockout Lever) for a choke lever - mounted on handle bars
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Post by Dieseldog on Aug 6, 2020 15:44:55 GMT 1
Sun tour lock out lever
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Post by Tobyjugs on Aug 6, 2020 17:16:55 GMT 1
What do you folks think my spec' may make BHP wise: 400cc Liners, pistons etc Reprofiled head PWK 28s & air socks Nikkon F2 pipes & TZ Cans Vape Power Dynamo Ignition Ignitech programmable ignition Cheers Mark You are using 4LO cylinders?
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Post by lcmarky on Aug 6, 2020 17:43:50 GMT 1
What do you folks think my spec' may make BHP wise: 400cc Liners, pistons etc Reprofiled head PWK 28s & air socks Nikkon F2 pipes & TZ Cans Vape Power Dynamo Ignition Ignitech programmable ignition Cheers Mark You are using 4LO cylinders? Yes. They are with Norbo for new liners..
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Post by Tobyjugs on Aug 6, 2020 19:42:43 GMT 1
Then I will guess 60 to 65pk
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Post by lcmarky on Aug 6, 2020 20:44:49 GMT 1
Then I will guess 60 to 65pk That’ll do..
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Rob123
Thrash Merchant
Posts: 382
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Post by Rob123 on Aug 6, 2020 21:18:24 GMT 1
Are you planning on a dyno run bud? I'll be interested to see what it achieves. Would be interesting to run it with stock carbs vs your 28,s
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Post by lcmarky on Aug 6, 2020 21:24:15 GMT 1
Are you planning on a dyno run bud? I'll be interested to see what it achieves. Would be interesting to run it with stock carbs vs your 28,s Yes. Definitely but I won’t be faffing with the standard carbs having gone to this trouble.
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Post by Tobyjugs on Aug 6, 2020 21:57:13 GMT 1
Also try to find out if the internal diameter of the stinger is big enough for the 200cc cylinders
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Post by lcmarky on Aug 7, 2020 8:05:42 GMT 1
Also try to find out if the internal diameter of the stinger is big enough for the 200cc cylinders Recommended and supplied by Norbo, so I figure they are.
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Post by midlifecrisisrd on Aug 7, 2020 8:52:04 GMT 1
Also try to find out if the internal diameter of the stinger is big enough for the 200cc cylinders Good point Remember Kenny mentioning it was getting close to the limit of his standard stinger size when he did my 385 pipes Steve
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Post by lcmarky on Aug 7, 2020 9:47:05 GMT 1
I can measure the inlet/outlet and report back. What is deemed acceptable out of interest for 400cc?
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Post by tacky1 on Aug 7, 2020 15:14:37 GMT 1
This is how I drill mine, Then press fit the injector.
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Post by Tobyjugs on Aug 7, 2020 17:29:44 GMT 1
I can measure the inlet/outlet and report back. What is deemed acceptable out of interest for 400cc? Off the top of my head i think 23mm is the limit and 24 will be safe. Hopefully someone like Kenny or Dave will comment on this to make sure i'm not talking crap. I have two sets of pipes which i love. One set is from TSA and it makes a 350 go like a scolded cat. One set from PS Tuning and it make my 400 go quick with good manners The thing is when i change them around they do not work as good. I really thought that kenny's pipes were going to out perform the PS Tuning pipes on the 400 engine but it was just lacking. you can feel it when riding and you can see it on the dyno. Vice versa with the 350 engine. It isn't much and if you didn't have anything to compare it with you would be still happy. Just my experience to let you know that what ever you do make sure the ingredients fit. Go with one person because his ingredients make a good result. I really believe in "too many chefs spoil the broth" when it comes to tuning
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justyr
Thrash Merchant
Posts: 331
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Post by justyr on Aug 7, 2020 22:08:59 GMT 1
Where can you buy pwk28 ‘s just now?
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Post by lcmarky on Aug 8, 2020 6:52:30 GMT 1
Where can you buy pwk28 ‘s just now? Try Norbo
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Post by dusty350 on Aug 8, 2020 7:45:20 GMT 1
And Mutts does them too. He drilled and fitted the oil spigots and also jetted them for my set up using previous data from dyno runs. This may obviously need tweaking but it's nearer than they would have been otherwise. I think Martin at Madbiker also supplies, so plenty to choose from. Dusty
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Post by lcmarky on Aug 9, 2020 17:14:35 GMT 1
And Mutts does them too. He drilled and fitted the oil spigots and also jetted them for my set up using previous data from dyno runs. This may obviously need tweaking but it's nearer than they would have been otherwise. I think Martin at Madbiker also supplies, so plenty to choose from. Dusty Very useful prep work I’d say.
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Post by lcmarky on Aug 9, 2020 17:25:20 GMT 1
I can measure the inlet/outlet and report back. What is deemed acceptable out of interest for 400cc? Off the top of my head i think 23mm is the limit and 24 will be safe. Hopefully someone like Kenny or Dave will comment on this to make sure i'm not talking crap. I have two sets of pipes which i love. One set is from TSA and it makes a 350 go like a scolded cat. One set from PS Tuning and it make my 400 go quick with good manners The thing is when i change them around they do not work as good. I really thought that kenny's pipes were going to out perform the PS Tuning pipes on the 400 engine but it was just lacking. you can feel it when riding and you can see it on the dyno. Vice versa with the 350 engine. It isn't much and if you didn't have anything to compare it with you would be still happy. Just my experience to let you know that what ever you do make sure the ingredients fit. Go with one person because his ingredients make a good result. I really believe in "too many chefs spoil the broth" when it comes to tuning The Nikkon F2 Exit is 23mm. Silencer exit is 25.4mm.
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