Possesed hawk??
04-05-2009, 02:59 PM
#1
RubberRoaster
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Possesed hawk??
So last night I was prepping my bike for a very high speed ride... cleaned the filter, lubed the chain.... I removed the L shaped housing that directs air into the front of the airbox. It has a stock filter and I am pretty sure stock jets. The bike always runs fine and can usually get to about 171mph. While going through the motions on the ride today the bike started to stumble after I hit 140 mph. Then it acted like it was out of gas, and started sputtering really bad, eventually after I got down to 40 mph or so the bike kept going but sputtered horribly. After a bit the bike was fine provided I kept it around a 100 or less. Then after leaving the gas station and heading home it sputtered for about 4 miles at 60 mph and I had to fight to keep it there. Then the rest of the way home it did good right about 90 mph without any problems, then just before I got home it started up again like it was loosing fuel. Any ideas??? Maybe getting too much air? I am going to put the airduct back on and see if that helps but that seems like a really stupid reason for the bike to act like it did. I could understand too much air at 140 mph, but it did it at 60 mph just as well. Please help if you have any ideas.
04-05-2009, 03:06 PM
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RubberRoaster
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04-05-2009, 03:12 PM
#5
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One of the times it went that fast I was using bottled O2. Some of the altitudes I ride at are not very friendly for a carbed bike. The other 3 or 4 times was going down a slight incline... Maybe 3%?? Trust me, the way it is running now it feels like I have a restrictor plate on it... 140 and it dies. Nobody has an idea? Can that air duct really have that much of an effect on it?
04-05-2009, 03:20 PM
#7
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Don't know for sure but would guess maybe yeah. Best way to find out would be to put the snorkel back on and go for a run, yes?
I'd guess that Honda didn't design the bike with an air box snorkel to slow you down, but to make the bike run right. I've never messed with it, but from what I've read, guys who remove the snorkel and/or air box lid usually end up with less power, less speed, and a bike that doesn't run right.
I'd guess that Honda didn't design the bike with an air box snorkel to slow you down, but to make the bike run right. I've never messed with it, but from what I've read, guys who remove the snorkel and/or air box lid usually end up with less power, less speed, and a bike that doesn't run right.
04-05-2009, 03:22 PM
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04-05-2009, 03:30 PM
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Redline with stock sprockets would be 169 actual if it could pull it, which it can't.
I'm not calling BS 'cause with mods, plus speedo error, plus a downhill slope you might see 171 on the gauge. Just know that without another 20 or more RWHP, a VTR won't pull that on level ground.
04-05-2009, 03:39 PM
#10
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I thought I've read where if you mess with the airbox (ie mod or filter) without jetting changes, then it could be bad. Been a while since I've read on it though. Sounds like a jetting issue (lean condition) maybe? Vacuum line blew off? Hell I don't know but I'm just naming off some areas I'd look into first. I'm sure the other more VTR knowledgable will chime in.
Only way my SH is going to hit 170+ is if I throw it out of a plane.
Only way my SH is going to hit 170+ is if I throw it out of a plane.
Last edited by haknslash; 04-05-2009 at 03:48 PM.
04-05-2009, 03:40 PM
#11
RubberRoaster
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Hell no. I don't think I could even come close to that on level ground. I am getting ready to do the 3.0 jets, but I have to have them sent to a machine shop.. Since this is my daily rider it will be a bit before that happens. Plus I wanna do the cams, exhaust.... I need to get this problem fixed first. Got a ride next weekend to payson and my girl needs to be running at her best.
04-05-2009, 03:42 PM
#12
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My guess for the L shaped ducts is that they allow air to flow on the backside of the radiators. I've removed my right side one for a little while when I ran the HID in it. I removed it so I could placew my ballast down there. Never noticed any difference. There is no port going to the airbox from those L shaped ducts so I don't see how it could affect the bike in terms of intake.
Only way my SH is going to hit 170+ is if I throw it out of a plane.
Only way my SH is going to hit 170+ is if I throw it out of a plane.
04-05-2009, 05:50 PM
#14
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You mentioned that you had cleaned your air filter. Don't know what kind of filter you have, but once after cleaning my K/N one of the block off boots came loose & droped down my carb blocking the butterfly. Would run fairly good @ partial throttle ,but when opened up would fall on it's face.
04-05-2009, 07:01 PM
#15
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Stock air filter. I just put the snorkel back on the bike. I ride to and from work during the week so obviously I wont be able to get it up to 140, but hopefully it solved the problem. I will keep this post updated. Please post any comments if you have any ideas.... Obviously swapping vacuum hoses wouldn't cause this... Only 2 hoses that could be swapped are the vent hose and the petcock hose... Big difference if you swap those.
04-05-2009, 07:20 PM
#17
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UM WHAT!!!!! DID YOU JUST SAY THAT ON A SUPERHAWK FORUM??!?!?!?!?!?
I love this bike more than I love myself. I may not be the best rider in the world, but this bike makes me look like a pro in a world full of R1 lovers!
04-05-2009, 07:28 PM
#18
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04-05-2009, 09:59 PM
#20
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I taught Vocational Automotives for 34 years, and when one of my students had a problem after working on a car, I'd ask what they did, then tell them to double check everything they touched or disconnected. That corrected the problem 99% of the time.
04-05-2009, 10:11 PM
#21
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Back in olden times when air boxes were just big enough to hold the air filter, you could pull the snorkel and air box lid, change the main jets, install a $225 full exhaust system and pick up 15%-20% more horsepower. Doesn't work that way any anymore.
Everything I've read by guys who removed the VTR snorkel and/or box lid says the bike ran poorly.
Everything I've read by guys who removed the VTR snorkel and/or box lid says the bike ran poorly.
04-06-2009, 09:57 PM
#22
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http://www.ablett.jp/bikes/vtr/air_box_lid.htm
"If you take the snorkel off the airbox you will create a lot of turbulence in the air box, so DON'T DO IT!!"
"If you take the snorkel off the airbox you will create a lot of turbulence in the air box, so DON'T DO IT!!"
04-08-2009, 12:53 PM
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Sorry for the late response. Work is busy. I have stock sprockets on the bike. Like I said, on a flat surface there is no way I could ever get it to 171.
On top of that, we do our riding on wide open roads, never in traffic.
Back to the topic, I put the snorkel back on and the problem seems to have corrected itself. My issue with that is, even at 15 mph it kept dying... So that just seems like an odd thing to cause that sort of problem. I won't know for sure if the problem is fixed until this weekend. I ride too and from work, but I wont go that fast in town.
On top of that, we do our riding on wide open roads, never in traffic.
Back to the topic, I put the snorkel back on and the problem seems to have corrected itself. My issue with that is, even at 15 mph it kept dying... So that just seems like an odd thing to cause that sort of problem. I won't know for sure if the problem is fixed until this weekend. I ride too and from work, but I wont go that fast in town.
04-08-2009, 12:54 PM
#26
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