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Post by howard on Feb 15, 2016 22:17:08 GMT 1
Where should I start with the jetting on my F2 fitted with TSA's , it has no snorkel and half a dozen 20mm holes drilled in the air box ? It's currently fitted with 290 mains and 30 pilots on 1AU carbs and has no bottom end .
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Post by muttsnuts on Feb 15, 2016 22:29:06 GMT 1
Hi Steve, sorry not got back to you yet, mad busy, I'll have a look tomorrow and send you some details
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Post by howard on Feb 15, 2016 22:42:22 GMT 1
Cheers Dave , tempted to try my PWK's once it's running good with the std carbs .
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Post by muttsnuts on Feb 15, 2016 22:43:17 GMT 1
ok, stock is 185 mains, pilots are 27.5, so I'd be starting at Mains: 240 Pilots: 27.5 (but you could leave 30's in, but might be a bit rich low down) See how that goes, although easiest way to sort it is on the dyno of course  |
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Post by markhoopy on Feb 15, 2016 22:51:48 GMT 1
Cheers Dave , tempted to try my PWK's once it's running good with the std carbs . Why not put the PWK's on now so you only have to sort the jetting out once Steve? |
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Post by looey on Feb 15, 2016 22:53:56 GMT 1
If it's any help, I had a fairly well tuned F2 by Taymar running Swarbricks and the airbox gutted right out and I'm pretty sure it was running 330 mains in the original Powerjets.
Are the 1UA carbs Powerjets ?, I can't remember, it's been quite a few years.
I can dig out the receipt with the jetting specs and pictures of the modified airbox tomorrow if it helps ?.
Just let me know
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Post by howard on Feb 15, 2016 22:58:34 GMT 1
290 does look way too rich so I'll drop them down to 240 and see if I can find any std pilots to try , I've not looked at the needle position yet , any thoughts ?
Can't be bothered with the PWKs just yet Mark , it's all the faffing with the cables and airbox rubbers ( unless you can share your settings of course )
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Post by howard on Feb 15, 2016 23:00:08 GMT 1
Looey , I could be wrong then about being too bigger main ! Any advice is appreciated thanks .
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Post by looey on Feb 15, 2016 23:17:53 GMT 1
I'll dig out the copies of the spec I had tomorrow.
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Post by tsa on Feb 15, 2016 23:32:10 GMT 1
290 mains would be about right if someone had blocked off the powerjets.
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Post by markhoopy on Feb 15, 2016 23:35:24 GMT 1
Can't be bothered with the PWKs just yet Mark , it's all the faffing with the cables and airbox rubbers ( unless you can share your settings of course ) Mine still needs running in and setting up properly .. only done 120 miles or so since the rebuild  When I bought the PWKs they had 135 mains and 38 pilots fitted, with N68 needles. To be on the safe side we put 150 mains and 42 pilots in and it does run quite well as you know - but more miles and then some time on a dyno is the only way to be sure. Airbox has a fair few 25mm holes drilled in the lid and in the section under the foam filter. No snorkel. Ian Emberton did the tuning work on the barrels and the TSAs are the race ones that let the engine rev higher. |
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Post by Eyrey1 on Feb 15, 2016 23:36:59 GMT 1
you have to f**k about with everything steve your never happy ,cant leave it alone !
just like me lol
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Post by markhoopy on Feb 15, 2016 23:41:28 GMT 1
you have to f**k about with everything steve your never happy ,cant leave it alone ! just like me lol Leaving everything alone is boring though I was looking at that engine sat in the wheelbarrow yesterday and thinking about selling the top end, putting a stroker crank in it and Athena barrels on .. no reason really, just something to do. |
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Post by Eyrey1 on Feb 15, 2016 23:46:24 GMT 1
you have to f**k about with everything steve your never happy ,cant leave it alone ! just like me lol Leaving everything alone is boring though I was looking at that engine sat in the wheelbarrow yesterday and thinking about selling the top end, putting a stroker crank in it and Athena barrels on .. no reason really, just something to do. why dont we ? be rude not to . its the only wheelbarrow ive seen with a ypvs engine in it ! 535 it mark ! |
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Post by Eyrey1 on Feb 15, 2016 23:47:44 GMT 1
picked the bike up off johnny today mark !
they just need laquer
he is dropping them off in about 2 weeks
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Post by markhoopy on Feb 16, 2016 0:08:10 GMT 1
Leaving everything alone is boring though I was looking at that engine sat in the wheelbarrow yesterday and thinking about selling the top end, putting a stroker crank in it and Athena barrels on .. no reason really, just something to do. why dont we ? be rude not to . its the only wheelbarrow ive seen with a ypvs engine in it ! 535 it mark ! That's what I was thinking .. but then when I was talking to JC about his 535 he told me it ate cranks and needed a rebuild every 1000 miles, so a 465 would be a better option. We could put it in the N and then sell that engine, so it would sort of pay for itself too Steve won't be happy that you've hijacked his thread! |
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Post by markhoopy on Feb 16, 2016 0:09:29 GMT 1
picked the bike up off johnny today mark ! they just need laquer he is dropping them off in about 2 weeks Everything bar the tank? Or just some of it? |
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Post by Eyrey1 on Feb 16, 2016 0:33:46 GMT 1
everything except the tank
his work is shit hot mark
i weighs nothing even the front mudguard its like a feather
pitty im over 19stone lol
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Post by Eyrey1 on Feb 16, 2016 0:35:42 GMT 1
why dont we ? be rude not to . its the only wheelbarrow ive seen with a ypvs engine in it ! 535 it mark ! That's what I was thinking .. but then when I was talking to JC about his 535 he told me it ate cranks and needed a rebuild every 1000 miles, so a 472 would be a better option. We could put it in the N and then sell that engine, so it would sort of pay for itself too Steve won't be happy that you've hijacked his thread! Steve won't be happy that you've hijacked his thread! steve dont give a shit ! not much bothers him . he is always a happy chappy |
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Post by Eyrey1 on Feb 16, 2016 0:37:31 GMT 1
I was talking to JC about his 535 he told me it ate cranks
he is the one that knows about these things mate , lucky we know him lol
see what he says but we want to be shooting for 100 plus like yazza has got
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Post by markhoopy on Feb 16, 2016 0:39:46 GMT 1
That's what I was thinking .. but then when I was talking to JC about his 535 he told me it ate cranks and needed a rebuild every 1000 miles, so a 472 would be a better option. We could put it in the N and then sell that engine, so it would sort of pay for itself too Steve won't be happy that you've hijacked his thread! Steve won't be happy that you've hijacked his thread! steve dont give a shit ! not much bothers him . he is always a happy chappy He's been here - to drop off the pipes I bought from him. Steve liked the YPVS engine sat in the wheelbarrow too. |
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Post by Eyrey1 on Feb 16, 2016 1:43:16 GMT 1
what pipes you got now ? is that set 3 or those allspeeds ?
your tsa pipes would look nice on my n2 mate ,lol
you can get better barrels than athena i think
whats all these cheeta cub ,cerval and a few others
you can get them with powervalves or without its a minefield
you would need to ask around those that have done it to find out whats the best
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Post by markhoopy on Feb 16, 2016 1:57:03 GMT 1
your tsa pipes would look nice on my n2 mate ,lol Which set - the black mild steel race ones or the new stainless ones?  |
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Post by Eyrey1 on Feb 16, 2016 2:16:12 GMT 1
mild steel same as the 3 sets ive already got , lol
and 500 is booked in for another set making as ive changed the bike so the ones i had made
dont look right especially the top one as i changed from mk1 to mk2 rear subframe
completely my fault i should of had them made at the end when i had fairings done and it was something like ready
expensive mistake dont you think?
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Post by looey on Feb 16, 2016 10:41:16 GMT 1
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Post by markhoopy on Feb 16, 2016 11:45:22 GMT 1
I copied your 'Swiss cheese' airbox modification on my 350N looey .. mine is exactly the same |
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Post by yazza54 on Feb 16, 2016 11:55:06 GMT 1
I was talking to JC about his 535 he told me it ate cranks he is the one that knows about these things mate , lucky we know him lol see what he says but we want to be shooting for 100 plus like yazza has got Shouldn't really eat cranks with a sensible Rev limit and good bearings, I think the general consensus is nothing over like 9750 on a 10mm stroker. I went for a 7mm for a bit of middle ground and because of the excellent job Kenny did on the pipes it peaks at 9500 anyway. Plus only 68mm Pistons to spin up not 72/73mm should help the longevity. Mark dent has just built a 10mm Athena but it peaks at 10500.. Will be interesting to see how that lasts. Bit high for me!! Especially taking into account that you need some over Rev after peak HP. |
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Mad Biker
Drag-strip hero
We lead others try and follow.
Posts: 243
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Post by Mad Biker on Feb 16, 2016 12:56:59 GMT 1
The out of balance crank is one factor that kills them quickly Ive used these before to vent airboxes. They look neat and each has its own filter which can be removed  |
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Post by muttsnuts on Feb 16, 2016 17:56:04 GMT 1
ok checked some of my notes, for my track bike (running POD filters) and 1UA carbs, I had 330's and standard pilots in, with a shortened needle, engine has full race tune on, TSA pipes and an ignitech, that ran pretty good.
I've now got PWK's on it, it has 135 mains, 52 pilots and JJH needles in, its not been tested yet, but seems pretty happy with what's in it
HTH
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Post by wallcraft on Feb 16, 2016 19:19:21 GMT 1
Are you running pods or Ramairs with the PWK's on those settings?
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