87 cbr needs more power
Honda-Tech Member
Joined: May 2000
Posts: 9,817
Likes: 0
From: San Gabriel, CA
Re: 87 cbr needs more power (wannaboost)
Change your front and rear sprockets. Go down one tooth in the front and up about 3 in the back. You should change your chain at the same time.
Banned
Joined: Aug 2001
Posts: 2,250
Likes: 0
From: Bay Area, CA, USA
Re: 87 cbr needs more power (marmaladeboy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by marmaladeboy »</TD></TR><TR><TD CLASS="quote">Change your front and rear sprockets. Go down one tooth in the front and up about 3 in the back. You should change your chain at the same time.</TD></TR></TABLE>'
yeah thats a lot cheaper. you sacrifice top end speed but you get more acceleration.
yeah thats a lot cheaper. you sacrifice top end speed but you get more acceleration.
Trending Topics
Thread Starter
Junior Member
Joined: Apr 2003
Posts: 48
Likes: 0
From: around da streets
Re: 87 cbr needs more power (Luke)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luke »</TD></TR><TR><TD CLASS="quote">87 CBR, hmmm. I would out it as you are looking for straightline gains. </TD></TR></TABLE>
just overall performance nothing to dramatic it's pretty quick now but i wanna go to the next step right now i have exhaust but i need more
just overall performance nothing to dramatic it's pretty quick now but i wanna go to the next step right now i have exhaust but i need more
Joined: Sep 2002
Posts: 959
Likes: 0
From: Warren, RI, USA
Re: 87 cbr needs more power (wannaboost)
Having an exhaust is part of your problem. Exhausts and jet kits trade midrange power for high end power.
Put the stock exhaust back on and you will get your midrange power back. Your best bet is to take it to a shop and have it jetted to match the exhaust you have. Going to smaller main jets would probably help.
Other than that, your only other option is to change the gearing. Switching to a 520 chain (yours has a 530, right?) would shave a few pounds of rotating mass and if you have an oversized rear tire you would be better off with the stock size.
Cheers,
Sean
Put the stock exhaust back on and you will get your midrange power back. Your best bet is to take it to a shop and have it jetted to match the exhaust you have. Going to smaller main jets would probably help.
Other than that, your only other option is to change the gearing. Switching to a 520 chain (yours has a 530, right?) would shave a few pounds of rotating mass and if you have an oversized rear tire you would be better off with the stock size.
Cheers,
Sean
Honda-Tech Member
Joined: Aug 2001
Posts: 2,825
Likes: 0
Re: 87 cbr needs more power (rapid_roy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rapid_roy »</TD></TR><TR><TD CLASS="quote">Having an exhaust is part of your problem. Exhausts and jet kits trade midrange power for high end power.
Put the stock exhaust back on and you will get your midrange power back. Your best bet is to take it to a shop and have it jetted to match the exhaust you have. Going to smaller main jets would probably help.
Other than that, your only other option is to change the gearing. Switching to a 520 chain (yours has a 530, right?) would shave a few pounds of rotating mass and if you have an oversized rear tire you would be better off with the stock size.
Cheers,
Sean
</TD></TR></TABLE>
Crap. Since when does reducing the chain do fxck all for performance? What if the reduced strength leads to a failre that rips the engine casing in two and spits him off?
Dont listen to this BS, keep the exhaust and get it dyno'd. Any holes in the midrange and you could stick some balanced downpipes on. End of the day an old bored and stroked inline 4 is always going to be peaky.
'shave a few pounds off the rotating mass' that is a classic
Put the stock exhaust back on and you will get your midrange power back. Your best bet is to take it to a shop and have it jetted to match the exhaust you have. Going to smaller main jets would probably help.
Other than that, your only other option is to change the gearing. Switching to a 520 chain (yours has a 530, right?) would shave a few pounds of rotating mass and if you have an oversized rear tire you would be better off with the stock size.
Cheers,
Sean
</TD></TR></TABLE>
Crap. Since when does reducing the chain do fxck all for performance? What if the reduced strength leads to a failre that rips the engine casing in two and spits him off?
Dont listen to this BS, keep the exhaust and get it dyno'd. Any holes in the midrange and you could stick some balanced downpipes on. End of the day an old bored and stroked inline 4 is always going to be peaky.
'shave a few pounds off the rotating mass' that is a classic
Honda-Tech Member
Joined: Jul 2001
Posts: 4,104
Likes: 0
From: Marietta, GA, USA
Re: 87 cbr needs more power (Luke)
520 chain weighs less than the 530. That shaves off rotating mass. Doesnt do much, but it still does shave off weight.
Modified by BoostedSi at 12:39 AM 3/12/2004
Modified by BoostedSi at 12:39 AM 3/12/2004
Joined: Nov 2001
Posts: 3,003
Likes: 1
From: the big brown truck is my daddy
Re: 87 cbr needs more power (BoostedSi)
I'm thinking Luke has a good idea of the concepts at play but has the benefit of actual experience... the kind that decides if a change justifies it's inherent side effects. It's called racing. 520 Oring chains on streetbikes is a borderline modification in my opinion. Any increased drivetrain efficiency is negligable as the cost and shortlived life overshadow any "gains". This is considering how most people seem to treat their chains and their bikes for that matter. Plus going to a 520 would require new sprockets... just more money thrown at a lost cause. This is probably the one thread on h-t this year that I would recommend a newer bike.
Thread
Thread Starter
Forum
Replies
Last Post
