R-77 full system 08 blade - Honda Motorcycles - FireBlades.org
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post #1 of 16 Old 04-17-2009, 3:04 AM Thread Starter
 
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R-77 full system 08 blade

does anyone have this system? How do you like it? Is it bad in the long run to throw an exh. system on a bike without tuning it? I dont really want to have to buy a power commander and deal with the fuel consumption. Is the slip on more cost effective or are the stock headers really weariness enough to change?

MC
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post #2 of 16 Old 04-17-2009, 4:33 AM
 
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Re: R-77 full system 08 blade

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Originally Posted by Mcalvert1000 View Post
does anyone have this system? How do you like it? Is it bad in the long run to throw an exh. system on a bike without tuning it? I dont really want to have to buy a power commander and deal with the fuel consumption. Is the slip on more cost effective or are the stock headers really weariness enough to change?

MC
yes, I have got it, it is titanium/carbon version. I love it. If you will not get the power commander AND tune it on the dyno then your bike wil run VERY lean. Try More Power Racing - Car Truck and Motorcycle Accessories - they also do price match. I bought everything from them (exhaust, power commander and BMC air filter).

I got approximately 10 bhp more across whole range of rpm, the flat spot at around 4 thousand rpm is gone. The fuel consuption is worse, 5-10 % less miles from the tank than before. Many places where I had to ride in the first gear are fine in the second gear now and bike also runs cooler.
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post #3 of 16 Old 04-17-2009, 7:12 PM Thread Starter
 
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Re: R-77 full system 08 blade

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Originally Posted by Blackadder View Post
yes, I have got it, it is titanium/carbon version. I love it. If you will not get the power commander AND tune it on the dyno then your bike wil run VERY lean. Try More Power Racing - Car Truck and Motorcycle Accessories - they also do price match. I bought everything from them (exhaust, power commander and BMC air filter).

I got approximately 10 bhp more across whole range of rpm, the flat spot at around 4 thousand rpm is gone. The fuel consuption is worse, 5-10 % less miles from the tank than before. Many places where I had to ride in the first gear are fine in the second gear now and bike also runs cooler.
word. ive been hearing very mixed results as i have been looking for an answer to this. some say the stock pipe is the best and that there is no more power to be had because of the valve system (even though it doesnt make much sense for the topend). A cross section diagram of the stock pipe makes me wonder though. Im no engineer but it doesnt look like its the absolute best design for an exh. sys. it kinda goes into a chamber then the valve decides which hole it comes outta. This makes me think all rough surfaces (hinge for the valve) might cause some turbulence making room for improvement. am i on the right track here?
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post #4 of 16 Old 04-18-2009, 1:31 AM
 
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Re: R-77 full system 08 blade

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Originally Posted by Mcalvert1000 View Post
word. ive been hearing very mixed results as i have been looking for an answer to this. some say the stock pipe is the best and that there is no more power to be had because of the valve system (even though it doesnt make much sense for the topend). A cross section diagram of the stock pipe makes me wonder though. Im no engineer but it doesnt look like its the absolute best design for an exh. sys. it kinda goes into a chamber then the valve decides which hole it comes outta. This makes me think all rough surfaces (hinge for the valve) might cause some turbulence making room for improvement. am i on the right track here?
The stock exhaust system has to comply with noise and emission regulations. It is not bad, but the valves (there are two inside) system creates uneven torque increases up to 6000 rpm. I think you might be almost on track understanding why after market systems can achieve better results: you get smooth bigger diameter pipes flowing more gasses. If you go for some significantly lighter system than the stock one you can not only increase the bhp but you will save a few pounds of weight too.
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post #5 of 16 Old 04-18-2009, 7:21 AM
 
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Re: R-77 full system 08 blade

I havnt got a yoshi but have a Akrapovic full system which should be around the same figues but can say that the original down pipes flow realy well and the difference on this model between aftermarket and original is between 8-10 more at the very top end with a PC111.So in the UK about 169-172BHP at the wheel depending on dyno and conditions but the big change is the the fueling which will improve the throttle response and mid range wollop and completely agree with blackadder on his previous posts.Heres my dyno sheet on a tight engine.
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post #6 of 16 Old 04-18-2009, 12:08 PM
 
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Re: R-77 full system 08 blade

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Originally Posted by Stu748R View Post
I havnt got a yoshi but have a Akrapovic full system which should be around the same figues but can say that the original down pipes flow realy well and the difference on this model between aftermarket and original is between 8-10 more at the very top end with a PC111.So in the UK about 169-172BHP at the wheel depending on dyno and conditions but the big change is the the fueling which will improve the throttle response and mid range wollop and completely agree with blackadder on his previous posts.Heres my dyno sheet on a tight engine.
and here is my graph:
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post #7 of 16 Old 04-18-2009, 1:20 PM Thread Starter
 
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Re: R-77 full system 08 blade

damnation. im convinced. thats quite impressive guys.
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post #8 of 16 Old 04-27-2009, 4:27 PM
 
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Re: R-77 full system 08 blade

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Originally Posted by Blackadder View Post
and here is my graph:
Do you have the stock dyno to compare against? This is the first Yoshi dyno i have seen, i made very similar numbers with a full arrow and bmc filter/tune. Within 1 hp and .2 tq.
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post #9 of 16 Old 04-27-2009, 4:30 PM
 
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Re: R-77 full system 08 blade

If you're not going to get a power commander, stay with the stock exhaust
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post #10 of 16 Old 04-27-2009, 4:58 PM
 
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Re: R-77 full system 08 blade

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Originally Posted by fastrob691 View Post
Do you have the stock dyno to compare against? This is the first Yoshi dyno i have seen, i made very similar numbers with a full arrow and bmc filter/tune. Within 1 hp and .2 tq.
I am sorry I do not have the stock chart, I have seen one and heard about other results to be somewhere from 157 to 164 bhp. I think this board got a thread somewhere with the stock dyno chart.
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post #11 of 16 Old 04-28-2009, 11:23 AM
 
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Re: R-77 full system 08 blade

Cool its always nice to compare your own stock to modded to see the gains, mine was 157 with the Z-bomb(gives back the top end which is stock in europe) and 168 with system and tune.
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post #12 of 16 Old 04-28-2009, 1:00 PM
 
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Re: R-77 full system 08 blade

Quote:
Originally Posted by Stu748R View Post
I havnt got a yoshi but have a Akrapovic full system which should be around the same figues but can say that the original down pipes flow realy well and the difference on this model between aftermarket and original is between 8-10 more at the very top end with a PC111.So in the UK about 169-172BHP at the wheel depending on dyno and conditions but the big change is the the fueling which will improve the throttle response and mid range wollop and completely agree with blackadder on his previous posts.Heres my dyno sheet on a tight engine.


Seconded .. This setup is fantastic... and I get 50mpg
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post #13 of 16 Old 04-29-2009, 9:14 AM
 
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Re: R-77 full system 08 blade

hu? 50mpg?
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post #14 of 16 Old 04-29-2009, 9:40 AM
 
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Re: R-77 full system 08 blade

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Originally Posted by TroyBoy30 View Post
hu? 50mpg?
Yes that's correct... 50 miles per UK gallon riding around normally, i e, town work and cruising around 80 to 90 mph-ish.. Full Akrapovic and PC111
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post #15 of 16 Old 04-30-2009, 8:18 AM
 
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Re: R-77 full system 08 blade

i'm averaging 32 per US gallon
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