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Driveability explanation.

  • Thread starter Thread starter Anonymous
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Anonymous

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I am new in the game of motorcycle rebuilding and have a 1980 1100E. I am replaceing my after market 4 into 2 exhaust and replaceing it with a 4 into 1 Vance and Hine megaphone. I am then going to re-jet the carbs with a Dyno-jet kit. I keep reading about the loss of DRIVEABILITY but do not know exactly what it means. Could some explan it to me in laymans terms and what I can expect to get from the mod. that I am preforming.

Greg :oops: :oops: :)
 
Re: Driveability explanation.

Greg Hood said:
I am new in the game of motorcycle rebuilding and have a 1980 1100E. I am replaceing my after market 4 into 2 exhaust and replaceing it with a 4 into 1 Vance and Hine megaphone. I am then going to re-jet the carbs with a Dyno-jet kit. I keep reading about the loss of DRIVEABILITY but do not know exactly what it means. Could some explan it to me in laymans terms and what I can expect to get from the mod. that I am preforming.

Greg :oops: :oops: :)
Click to expand...
I have to ask you if you are chaning the air filters. Before any one can help you we need to know what you are doing with the air filters.
 
Sorry I thought I had given all information. I am changeing my stock airfilters out to install UNI pods.

Greg
 
Driveability is......

Driveability is......

Driveability includes a lot of factors. Some of these are: Ease of starting /warmup, smooth idle, linear power delivery & good fuel mileage. The mods you list will improve the engine's airflow, both intake & exhaust.
You'll have to increase the amount of fuel by changing the jetting of your carbs. I'll leave it to the more experienced to offer jetting advice. Good luck!
 
Also with this set-up, you will have slightly less low end torque, but more upper RPM torque. :twisted:
 
I have an 82 1100E with a V+H megaphone.
Driveability won't be a problem, but after a half hour the drone from the pipe gets old.

bill
 
I believe driveability refers to the way the a suped up bike behaves when off the track.

This would include the bike only responding to the throttle only when rapidly cranked to wide open, the bikes inability to maintain a slow and even speed, and its over responsiveness to the throttle when going through tricky corners (lifting the front wheel just as you are about to grind a peg). Basically, the bike will try to kill you at every turn because it has too much power to be babied around. :P

Steve
 
Driveability.

Driveability.

Driveability is like the road manners the bike has. How it starts,warms up,idles,throttle response,powerband,smoothness of acceleration and top end. If the jetting is not correct,you can expect various degrees of surging,backfiring/spitting and overheating if too lean. If too rich,you can expect poor throttle response/bogging,black exhaust,poor fuel mileage and fouling plugs. Jetting can involve a LOT of trial and error. If you finally get it right you will have more power and not lose significant manners/mileage,but you may have to live with some minor annoyances. If you do a poor job of jetting, you can ruin an engine,or at the least drive around hating how the bike runs and wishing you never messed with it. KK.
 
IF you're going the jet kit route 80% of the guesswork is out of the picture. The other 20% is the fine tuning of the settings. The dynojet booklet gives you the base settings to go off of and gives you tips for too rich, lean or whatever to dial in what your bike needs. Every bike has different modifications, mileage and so forth which determines how much fine tuning you need to do.
Anyway, the most obvious "drivability" problem you may find is a longer warm up time because of the cold fresh air through the open filters.Other than that you should be fine.Oh, and you'll notice a slight decrease in fuel economy due to the fact that you are doing a performance mod and not a fuel eco. mod.
 
I don't know weather to be excited or scared to death. I am putting the Vance & Hind 4 into 1 on because the 4 into 2 pipes had were rusted through and had to be replaced. I thought rather than getting a new set of 4 into 2 I would add a little extra power and get the 4 into 1. I have the original air box the UNI pods and also have the Dyno-jet kit with stages 1&3. Since I am not planing to race my 1100E and would like a little more power but its not really necessary what would be the best and easist set up for my limited knowledge.

Greg :? :( :?
 
billp said:
I have an 82 1100E with a V+H megaphone.
Driveability won't be a problem, but after a half hour the drone from the pipe gets old.

bill
Click to expand...
Im almost deaf and i can run with open megs all day and actually think it sounds mellow 8O 8O
 
Greg,

Be excited!
Take your time with the jetting and testing and it will work fine. The Dyno-Jet guys know what they're talking about so follow their instructions. If you can't get the bike tuned in, don't beat your head against the wall like I did. Look for something else that's wrong. It took me three years to figure out the cam timing was too far off due to a stretched chain.

Steve
 
billp said:
I have an 82 1100E with a V+H megaphone.
Driveability won't be a problem, but after a half hour the drone from the pipe gets old.

bill
Click to expand...
I have a 1229 cc megaphone pipe and while I love the performance the noise can be irratating on long trips . I have rectified this problem in two ways. ONe is on the long trips I wear foam ear plugs. And the other is around town or small trips I have headphones built into the helmet. Hearing soft music is much nicer than hearing vvrrroooommmmmmm
 
I have never herd the megaphone are they really that loud. I had a set of MAC 4 into 2 pipes and blew a baffel out of one last summer. I took the baffel out of the other side and spent the rest of the summer sounding like a Harley(or as close as a Suzuki can) It was LOUD but it was no to bad. Turned a lot of head though. :twisted: Will the megaphone be as loud. :?

Greg
 
Greg Hood said:
I have never herd the megaphone are they really that loud. I had a set of MAC 4 into 2 pipes and blew a baffel out of one last summer. I took the baffel out of the other side and spent the rest of the summer sounding like a Harley(or as close as a Suzuki can) It was LOUD but it was no to bad. Turned a lot of head though. :twisted: Will the megaphone be as loud. :?

Greg
Click to expand...

:lol: :lol: :lol: :lol: what did you say??
 
I guess that means they are loud. I love turning heads :twisted: so watch out Annapolis here I come.

Greg :D
 
Vrooom......

Vrooom......

Don't sweat it Greg, like they've said the dial-in on the jetting will be spot on 80% of the time......My old 1000 with a Yoshimura/Kerker combo dialed in, only gave a slight flat spot. A flat spot is a section of the RPM band where the motor seems weak & not wanting to win up thru that "band" with much enthusiasm.
As to the sound.....riding with two or three buddies on a straight drone down a wide freeway ,all in formation, the sound emmenating from all the exausts is really quite something to behold!
Rick...........
 
What you consider loud may be music to another's ears. Look at Harley riders, they love noisy 8O (my perspective) pipes. I love my bike barely making a sound. Stealthy power, that is what I like. 8)
 
That sweet sound

That sweet sound

Nick Diaz said:
How does one behold sound?
Click to expand...


Nick:
Didn't you ever as a kid make those Vrooom..Vrooom sounds of the cars or motorcycles you heard of?
How about the sound of a radial engine of an old prop fighter? The silky smooth sound of P-51 V-12 fighter? How bout the exotic sounding(but lousy machine) Kawasaki H-2 750 with expansion chambers?
Sorry, but the Harley staccato sound is just obnoxious to me. The current crop of sportbikes with the snarl of 6 grand just poking along down the road just sounds too busy, like an angry hornet. The low RPM growl of our bikes is just right
Rick.......( Don't get me going on this subject!)
 
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