serius blk
Zone Head
Posts: 543
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posted January 08, 2011 08:44 AM
Bike low on mph. whats the problem
Finally made it to a quarter mile track last night. I had 08greenzx14 come out also. I did put the stock coil on and the bike is now squatting. Maybe alittle to much. I changed my gearing to 16/43 but brought my 46 rear also. The bike was only mph 140-146 with both of us riding it. Im 240 and 08green is 168. we were running 116-120 in the eighth but the back half was not there. The bike has the air filter in and running 89octane. Its not missing or knocking and we went from 28psi to 18psi in the rear tire. I know i need a new tire. The bike is running rich and im going to check the clutch,plugs and compression today. His mph was no better than mine and he is 80 less in weight and the gearing change really made no difference.
  
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08green
Expert Class
Posts: 188
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posted January 08, 2011 08:55 AM
We ran about the same MPH in the 1/8, tells me im spinning, which i was. Black "sooty" exhaust and didnt really feel strong sound like a rich condition. Start pulling 3-5% fuel from your map each pass.
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2004 ZX10
2008 ZX14
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08green
Expert Class
Posts: 188
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posted January 08, 2011 08:57 AM
And no guys I was not shifting his bike @ 12.5...lol
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2004 ZX10
2008 ZX14
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serius blk
Zone Head
Posts: 543
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posted January 08, 2011 09:00 AM
yea im going to check everything and go from there. U mind send me that map to see if it makes a difference with the mr12
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08green
Expert Class
Posts: 188
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posted January 08, 2011 09:07 AM
Maps are mostly made from the pipes and cams, since mine are different I dont know if it will help or hurt. Send me your email addy.
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2004 ZX10
2008 ZX14
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serius blk
Zone Head
Posts: 543
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posted January 08, 2011 09:17 AM
our combination is not that different
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LeonidasZX14
Pro
Posts: 1277
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posted January 08, 2011 09:54 AM
 Edited By: LeonidasZX14 on 8 Jan 2011 17:55
.
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09' ZX14
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LeonidasZX14
Pro
Posts: 1277
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posted January 08, 2011 09:56 AM
Clutch
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09' ZX14
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01smokes
Needs a job
Posts: 2243
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posted January 08, 2011 10:59 AM
What do you normal trap in the 8th??
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PayPal, vigilart22@yahoo.com
Email, artvgl@yahoo.com
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Wheelie
Needs a life
Old Man
Posts: 6902
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posted January 08, 2011 11:41 AM
track, hazing the tire
wee
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serius blk
Zone Head
Posts: 543
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posted January 08, 2011 12:31 PM
i do 116-120 and generally run 6.0 or 5.90s. The sixty foots werent there for sure. 08green runs faster than that in the eighth. I keep having the same times with different combination gearing. Pulled the plugs. They are Ash colored and blistered a bit.
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01smokes
Needs a job
Posts: 2243
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posted January 08, 2011 12:54 PM
Is this your 1st time to a 1/4 mile track. Normally I see a 28mph back half from 8th to 1/4. I'm not sure with others but that should give you something to look at...
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Email, artvgl@yahoo.com
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serius blk
Zone Head
Posts: 543
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posted January 08, 2011 01:39 PM
yea first time for me and the bike.
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01smokes
Needs a job
Posts: 2243
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posted January 08, 2011 01:49 PM
Can you post some slips up??
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Email, artvgl@yahoo.com
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eklipse636
Needs a life
ZX-14
Posts: 6046
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posted January 08, 2011 02:26 PM
The air is a big factor on mph as well. I've had days I could barely get 120, then I've ran 124 before in good weather.
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Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
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serius blk
Zone Head
Posts: 543
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posted January 08, 2011 03:04 PM
yea i will try to do that
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LeonidasZX14
Pro
Posts: 1277
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posted January 08, 2011 03:28 PM
DUDE, the only thing that will not cause a mph change with 80lbs worth of weight difference is that the clucth is slipping. There is no possible way that you weighing 240 and your buddy weighing 160 that there would not be a MPH variance. Yes the air plays a role but regardless you guys should have seen a big MPH difference. Were'nt you the one having major traction issues and I told you to check your clutch then too. Pull the clutch and mic it. Just trying to help and you are probably driving yourself crazy over something simple.
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09' ZX14
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serius blk
Zone Head
Posts: 543
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posted January 08, 2011 04:24 PM
im sure ur correct. Its coming out as well. Im checking all of that so if there is a problem with it i will find it. The bike is squating know tho. U are right there should have been a big difference in 80 pounds.
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01smokes
Needs a job
Posts: 2243
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posted January 08, 2011 04:26 PM
Ya the clutch is most likely toasted....
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00Busa
Expert Class
Trying to go FASTER !
Posts: 270
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posted January 10, 2011 05:56 AM
I had the same problem during the heat of the summer - pulled out some fuel on top until the mph came back.
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'00 Busa / '06 14 /
IT AINT BRAGGING, IF YOU CAN BACK IT UP !
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted January 10, 2011 08:35 AM
How long can a clutch last in that condition (where it hurts mph but it doesn't completely let go)???? I thought my mph was low all last year but I never changed my clutch because it wasn't slipping as far as I could tell. My max mph last year was 145, but most the time it was 142. What is a good clutch stack supposed to measure again?
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serius blk
Zone Head
Posts: 543
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posted January 10, 2011 12:56 PM
yea i cant feel it slipping at all. Usually i can but i guess that doesnt mean its not slipping. I have a brocks map in it and it is rich
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted January 10, 2011 01:27 PM
quote:
yea i cant feel it slipping at all. Usually i can but i guess that doesnt mean its not slipping. I have a brocks map in it and it is rich
The track maps never worked well for me on pump. I always got the best results with the street map.
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