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Post by hudtm60 on Aug 12, 2017 22:13:04 GMT 1
Planning to send the carbs to Mutts for a ballsout cleaning but still can't help chasing that 5-6rpm flat spot myself. After reading his fascinating Product Testing thread highlighting the potential bolt-on-tastic possibilities of the V-Force 4 reeds- I felt I needed to get some. Few months ago I had replaced originals with Hytech carbons but it's made no difference. I got on the phone with VForce, talked to their tech rep Jeff who said V4144-2 for the Banshee would fit an '81 RDLC so I ordered them immediately and they showed up the next day- on my birthday no less. Most Important to Note: I am sure further research on this site would have revealed this to me but: the V-Force 4 reeds won't fit a non-valve 4L0 350LC...they are about a cm too wide. Interesting point though...I threw in some new plugs and I've been thinking the bike is running rich so I lowered the needles to the max, put everything back together and took it out for a run and it flew like s**t off a shovel- no flat spot. Yes! At the next traffic light it's ticking over high which suggested an airleak to me and right enough I could see the airbox hoseclips rattling around... I'd forgotten to tighten them. I stopped at at local bikeshop- borrowed a philips tightened them up and.....yeah...didn't run as good. So putting all that info together I'm guessing that it is still running too rich and trying to work out what to do next. Because I still feel the motor should run stock like it came from the factory I don't want to mess with the airbox....since it wasn't great on the original 220's think I'll get down to 190's or 200's. Notes: Motor: standard (as far as I know...never opened it up). Carbs: 4L0-01 Airbox: bog standard- no holes, new factory filter & snorkel intact Jets: 230's because there was a time where I thought it was running lean.... Pipes: original with Norbos Ezy Breathe baffles  Yes...yes....No!..No!......  even the naked eye can tell....but look how snug the Vpower reeds are at the end versus standard.....opinions I've read on this very site says it doesn't really matter though...  |
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Post by Norbo on Aug 12, 2017 22:57:36 GMT 1
V force have never fitted in lc blocks only ypvs , but with a little grinding you can make them fit
just dont get cared away down the sides as they will be very very thing by the time they will fit
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Post by hudtm60 on Aug 12, 2017 23:38:11 GMT 1
hmm good to know....maybe I might with some spare other barrels....
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Post by mattybeckett on Aug 12, 2017 23:49:11 GMT 1
I'd try 220 mains from what you've said.
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Post by JonW on Aug 12, 2017 23:59:31 GMT 1
yz80 will fit...
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Post by Eyrey1 on Aug 13, 2017 0:04:33 GMT 1
use 10mm specers before the reed valves and you dont need to grind as much out of them !
my advice is give the bike to mutts nutts to set it propperly on his dyno
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Post by hudtm60 on Aug 13, 2017 3:16:32 GMT 1
all good ideas but guess what...I took the top of the air filter off, the filter itself and all those little bars and it took off like a rocket.....consistently....a bit grunty down low and probably running a bit lean so will settle down and work out the jetting.
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Post by rigga on Aug 13, 2017 9:38:02 GMT 1
Remove the snorkel for starters, that will help.
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Post by hudtm60 on Aug 14, 2017 1:38:45 GMT 1
fearing a too lean mixture I brought the needles back up just too notches to make it a little richer and it was enough to make the 5-6k hesitation return so dropped them back down again and it's great- best it's ever been- since I've had it anyway. pulls fairly clean all the way through...a little worrying running without any filter but the induction howl is so addictive. there's probably a combination of things that would allow me to run it with the filter (go down to 190's) so will be thinking of that. or not. got stuck waiting for a train to go by then realized it was a photo op...  |
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Post by bare on Aug 14, 2017 3:22:36 GMT 1
all good ideas but guess what...I took the top of the air filter off, the filter itself and all those little bars and it took off like a rocket.....consistently....a bit grunty down low and probably running a bit lean so will settle down and work out the jetting. As background "info" Years ago Ed Erlenbach set a worlds' Land speed record onna LC.... Using OEM Reeds. He maintains that they are More than adequate for the Needs of an LC motor... regardless of tune. But Hey! what would he know ? |
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Post by 0h5h1t on Aug 14, 2017 10:23:09 GMT 1
all good ideas but guess what...I took the top of the air filter off, the filter itself and all those little bars and it took off like a rocket.....consistently....a bit grunty down low and probably running a bit lean so will settle down and work out the jetting. As background "info" Years ago Ed Erlenbach set a worlds' Land speed record onna LC.... Using OEM Reeds. He maintains that they are More than adequate for the Needs of an LC motor... regardless of tune. But Hey! what would he know ? Before vf4 reeds were developed? You can clearly see from mutts nuts testing that vf4 reeds work! After all, years ago a starting handle was considered adequate to start a car but I for one am glad not to have to hand crank my A4 every time I wanna pop to the shops. |
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Post by JMW on Aug 14, 2017 15:13:25 GMT 1
all good ideas but guess what...I took the top of the air filter off, the filter itself and all those little bars and it took off like a rocket.....consistently....a bit grunty down low and probably running a bit lean so will settle down and work out the jetting. As background "info" Years ago Ed Erlenbach set a worlds' Land speed record onna LC.... Using OEM Reeds. He maintains that they are More than adequate for the Needs of an LC motor... regardless of tune. But Hey! what would he know ? Was that back in circa 1766.......? VF - good reeds from moderate tune onward. Reed spacers never did much except give you room to get cables into flatslide carbs without fouling the frame or messing with the cable guides. At least the dyno numbers never suggested any change and 6-10mm just isn't enough to effect velocity or atomisation into the crank case. Just made it look tricker than it actually was. And for anything other than a sprint motor - keep the airbox...... its too expensive on pistons and rebuilds if you dont. |
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Post by hudtm60 on Aug 15, 2017 5:34:55 GMT 1
yep I would/should keep the airbox but presently it runs like crap with it on and like a rocket with it off.....
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Post by 4l04ever on Aug 15, 2017 8:37:49 GMT 1
Something is not right with your carbs/airbox, as 230's should not be bogging down.
Double check the carbs to make sure they are 4L0-01 and not 4L0-00 or 4L1-00.
Make sure there is not a mouse nest in the airbox or any other restriction....
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Post by mikee on Aug 22, 2017 11:15:25 GMT 1
I run 280 mains in my 4l0 27.5 pilots , allspeeds but that's of no consequence , no flat spot and really grunty , modern fuel I guess
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Post by wallcraft on Aug 22, 2017 12:49:14 GMT 1
I run 280 mains in my 4l0 27.5 pilots , allspeeds but that's of no consequence , no flat spot and really grunty , modern fuel I guess Nice, I take it your using the complete air box? |
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Post by mikee on Aug 22, 2017 22:52:35 GMT 1
Yup
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Post by hudtm60 on Aug 23, 2017 2:09:22 GMT 1
and....it's not just Presidents who need to be protected from their own stupidity-I'm sure I could've found out from this very forum that my next purchase was incompatible too....but no...the thrill of the chase took me deeper... it didn't help that the gentlemen at V Force Reed Inc (MotoTassinari) indulged me and sent a couple of reeds they thought might fit...i think they are probably meant for a YZ80 and indeed could fit should I get crazy with a file, it wouldn't take much, but- as far as I know me barrels have not been touched and I'm going to try and keep them that way. The summary is: unless they are hiding some thinner ones from me then the VForce3's don't fit a standard 4L0 either. Somebody somewhere wisely said that if the motor has been breathed upon/tuned- then VForce's are well worth it....otherwise just keep the standard reeds and blocks....so until I get myself a Kenny Roberts colours YPVS.... The End. PS it still runs great with the filter top and filter out....flirting with disaster? when aren't we?  |
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Post by JonW on Aug 23, 2017 2:53:38 GMT 1
I hear ya, but a gentle half hour with some burrs and youve got them in, they probably are yz80, the reeds on the LC are much the same as the ypvs 250 and you do need to fettle the cyls to get them in there too, but only by a little. There is a lot of meat on an LC cylinder at this point, ie an easy fit so long as the holes line up, which if yz80 they should.
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Post by lb on Aug 23, 2017 9:12:42 GMT 1
If not ill buy yhem off you  |
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