CBR RR throttle bodies

[TrickyNicky089_imp]

So basicly has anyone converted CBR RR throttle bodies to a cb1100 I bought a 2014 and starting my build and more power is a must this is my first post and I couldn't find anything on this topic

[the Ferret]

No one has done this on this board that I know of.

More power huh? you will spend a lot of money for very little return in your search for power, but that is your prerogative. No one has hit 100 RWHP yet, though Beardyweirdy is close and Powerdubs is trying awfully hard.

[PowerDubs_imp]

I’m at 98.xx whp before my tear down

That is stock ecu, so stock ign timing and once I saw the fuel curve, it was leaner at high rpm than ideal for power so I could have probably hit 100whp just by adding more fuel and definitely with an ecu tune.

As for your question on throttle bodies, let’s start with- what thought process have you put into your planned modifications, and what is your game plan?

Meaning- there is a lot to be done before throttle bodies should cross your mind.

Have you done the calculations to have an idea of the cfm the stock ITB flow VS the displacement and expected output of the engine?




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[TrickyNicky089_imp]

No I have not done any calculating honestly don't know how to on that part, however I do have a really good moto shop local to me that could help with the throttle body. now as for planed mods to the engine I was going to do full exhaust, throttle bodies with pods ecu flash and tune and am willing to do regrind cams over sized valves with port and polish, and even a little higher compression pistons if needed somewear around 10:1.I've been tearing threw this site since February when I bought the bike and it is a long road to 100hp but the hopes I had for it were realisticly 100-110hp optimistically 120hp

[misterprofessionality]

just curious a bit....but i'm wondering, why not buy something like a ZRX1200 or the like if you really want a modern inline-4 with that kind of power? is it just about the aesthetics of the CB11?

[PowerDubs_imp]

No point blindly throwing a pile of parts at the bike needlessly.

Until you do the math- the stock tb may be perfectly fine, same goes for the valve sizes, head port flow, etc.

You could easily loose power by making parts too big by loosing velocity, changing pulse resonance, etc.

No way would I ever consider ‘converting’ to another bikes TB. You’ll never get it to work correctly the same as stock.

What I would do- *IF* the tb ever became the bottleneck is start with old hot rod tricks-like permanently securing the butterfly screw threads and then grinding down the screw heads, thin the shafts, possibly remove one side of the shafts.

Heck, if you want to go crazy you can have a machine shop remove the stock plates, bore the housings to a little larger ID, fabricate new larger plates.

That would give you ‘bigger tb’ with no conversion mounting / control hassles.

As already said- there is a lot to do before you get crazy.

Bigger pistons and upping the CR certainly would make power with relatively easy work. Like the cams, you would need to have them custom made.

Would be next on my list if I ever want more after the cams are done. Probably will never do them though as I have never seen an aftermarket piston last like an untouched factory engine- doesn’t matter if on a bike or a car.

Why don’t you start by adding 2-3 teeth to the rear sprocket or dropping the front a tooth?


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just curious a bit....but i'm wondering, why not buy something like a ZRX1200 or the like if you really want a modern inline-4 with that kind of power? is it just about the aesthetics of the CB11?

I own a ZRX1200. Has a full pipe and jet kit. Makes a ton of power compared to the CB.

Yes- I like the CB look and vibe.

If you go on the ZRX forum you will still find guys hot rodding- bigger pistons, bigger carbs, cams, etc.





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[TrickyNicky089_imp]

Partially the look of the bike also the naked inline 4 and I'm a Honda guy

[misterprofessionality]

No point blindly throwing a pile of parts at the bike needlessly.

Until you do the math- the stock tb may be perfectly fine, same goes for the valve sizes, head port flow, etc.

You could easily loose power by making parts too big by loosing velocity, changing pulse resonance, etc.

No way would I ever consider ‘converting’ to another bikes TB. You’ll never get it to work correctly the same as stock.

What I would do- *IF* the tb ever became the bottleneck is start with old hot rod tricks-like permanently securing the butterfly screw threads and then grinding down the screw heads, thin the shafts, possibly remove one side of the shafts.

Heck, if you want to go crazy you can have a machine shop remove the stock plates, bore the housings to a little larger ID, fabricate new larger plates.

That would give you ‘bigger tb’ with no conversion mounting / control hassles.

As already said- there is a lot to do before you get crazy.

Bigger pistons and upping the CR certainly would make power with relatively easy work. Like the cams, you would need to have them custom made.

Would be next on my list if I ever want more after the cams are done. Probably will never do them though as I have never seen an aftermarket piston last like an untouched factory engine- doesn’t matter if on a bike or a car.

Why don’t you start by adding 2-3 teeth to the rear sprocket or dropping the front a tooth?


Sent from my iPhone using Tapatalk

just curious a bit....but i'm wondering, why not buy something like a ZRX1200 or the like if you really want a modern inline-4 with that kind of power? is it just about the aesthetics of the CB11?

I own a ZRX1200. Has a full pipe and jet kit. Makes a ton of power compared to the CB.

Yes- I like the CB look and vibe.

If you go on the ZRX forum you will still find guys hot rodding- bigger pistons, bigger carbs, cams, etc.





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I wanna say I do actually totally get it. I'd love to have the knowledge and tools to make my CB have more "go," so I wasn't trying to come off as "go buy a ZRX!" I was genuinely curious what the drive was behind making such an extreme change. Now, the question I'm going to ask is even dumber:

is it cheaper to make a CB11 go as fast as a stock ZRX, or to make a ZRX look like a stock CB11?

[peterbaron]

No point blindly throwing a pile of parts at the bike needlessly.

Until you do the math- the stock tb may be perfectly fine, same goes for the valve sizes, head port flow, etc.

You could easily loose power by making parts too big by loosing velocity, changing pulse resonance, etc.

No way would I ever consider ‘converting’ to another bikes TB. You’ll never get it to work correctly the same as stock.

What I would do- *IF* the tb ever became the bottleneck is start with old hot rod tricks-like permanently securing the butterfly screw threads and then grinding down the screw heads, thin the shafts, possibly remove one side of the shafts.

Heck, if you want to go crazy you can have a machine shop remove the stock plates, bore the housings to a little larger ID, fabricate new larger plates.

That would give you ‘bigger tb’ with no conversion mounting / control hassles.

As already said- there is a lot to do before you get crazy.

Bigger pistons and upping the CR certainly would make power with relatively easy work. Like the cams, you would need to have them custom made.

Would be next on my list if I ever want more after the cams are done. Probably will never do them though as I have never seen an aftermarket piston last like an untouched factory engine- doesn’t matter if on a bike or a car.

Why don’t you start by adding 2-3 teeth to the rear sprocket or dropping the front a tooth?


Sent from my iPhone using Tapatalk

just curious a bit....but i'm wondering, why not buy something like a ZRX1200 or the like if you really want a modern inline-4 with that kind of power? is it just about the aesthetics of the CB11?

I own a ZRX1200. Has a full pipe and jet kit. Makes a ton of power compared to the CB.

Yes- I like the CB look and vibe.

If you go on the ZRX forum you will still find guys hot rodding- bigger pistons, bigger carbs, cams, etc.





Sent from my iPhone using Tapatalk

Wise statement ....+1

[PowerDubs_imp]

No point blindly throwing a pile of parts at the bike needlessly.

Until you do the math- the stock tb may be perfectly fine, same goes for the valve sizes, head port flow, etc.

You could easily loose power by making parts too big by loosing velocity, changing pulse resonance, etc.

No way would I ever consider ‘converting’ to another bikes TB. You’ll never get it to work correctly the same as stock.

What I would do- *IF* the tb ever became the bottleneck is start with old hot rod tricks-like permanently securing the butterfly screw threads and then grinding down the screw heads, thin the shafts, possibly remove one side of the shafts.

Heck, if you want to go crazy you can have a machine shop remove the stock plates, bore the housings to a little larger ID, fabricate new larger plates.

That would give you ‘bigger tb’ with no conversion mounting / control hassles.

As already said- there is a lot to do before you get crazy.

Bigger pistons and upping the CR certainly would make power with relatively easy work. Like the cams, you would need to have them custom made.

Would be next on my list if I ever want more after the cams are done. Probably will never do them though as I have never seen an aftermarket piston last like an untouched factory engine- doesn’t matter if on a bike or a car.

Why don’t you start by adding 2-3 teeth to the rear sprocket or dropping the front a tooth?


Sent from my iPhone using Tapatalk

just curious a bit....but i'm wondering, why not buy something like a ZRX1200 or the like if you really want a modern inline-4 with that kind of power? is it just about the aesthetics of the CB11?

I own a ZRX1200. Has a full pipe and jet kit. Makes a ton of power compared to the CB.

Yes- I like the CB look and vibe.

If you go on the ZRX forum you will still find guys hot rodding- bigger pistons, bigger carbs, cams, etc.





Sent from my iPhone using Tapatalk

I wanna say I do actually totally get it. I'd love to have the knowledge and tools to make my CB have more "go," so I wasn't trying to come off as "go buy a ZRX!" I was genuinely curious what the drive was behind making such an extreme change. Now, the question I'm going to ask is even dumber:

is it cheaper to make a CB11 go as fast as a stock ZRX, or to make a ZRX look like a stock CB11?

Well, it would be impossible to make a ZRX look like a CB, so that's that. The ZRX is still cool looking in it's own sinister way.


A stock ZRX1200 puts down about 115whp.

I don't know how close we will ever come to that unless someone goes completely nuts throwing money and probably long term reliability out the window.

And the ZRX1200 responds VERY nicely to modifications, even on old school carbs. http://www.muzzys.com/ZRX-1200/mods/index.html

Here is the review from the site that made me lust after a ZRX1200 for many many years until I finally bought mine- http://www.motorcycledaily.com/2001/03/2...1zxr1200r/