Help with more power - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 32 (permalink) Old 03-12-2014, 03:08 PM Thread Starter
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Help with more power

I got the Rc out the other day and finally got it put on the dyno. I thought my numbers were decent till I got on here I realized they were not. He only put 114 HP to the ground and 69 ftlbs of torque. It has a full jardine exhaust on it with a old power commander. I do have the new exhaust getting installed this week and I am going to rerun it again. I also forgot to mention it has 100 octane race gas in it also. Need help to get back to the 125 to 130 range.

2002 Honda 929 Long Gone due to a deer
2005 Honda 954 Gone
2001 Honda RC51 Current Ride
2004 Honda 954 Again (Needed a 2 seater)
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post #2 of 32 (permalink) Old 03-12-2014, 03:30 PM
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Remember sp2's have more hp. And dyno's read differently too (I've seen 10 hp variance from one conservative dyno to another optamistic dyno with the same bike). I wouldn't worry much about numbers if the bike runs well. Try a few PC maps on the dyno to see what works best.

Since timing can't be changed, why bother with 100 octane?
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post #3 of 32 (permalink) Old 03-12-2014, 03:39 PM Thread Starter
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I do that every year after the bike has sat all winter just to get the old fuel out. I will not be buying much when it cost $7.45 a gallon. I am going to buy a newer version of he power commander and after the new exhaust gets installed, hopefully cross over 120 hp.

2002 Honda 929 Long Gone due to a deer
2005 Honda 954 Gone
2001 Honda RC51 Current Ride
2004 Honda 954 Again (Needed a 2 seater)
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post #4 of 32 (permalink) Old 03-12-2014, 03:42 PM Thread Starter
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Off topic question, Has anyone ran a 200 series tire on their rc?

2002 Honda 929 Long Gone due to a deer
2005 Honda 954 Gone
2001 Honda RC51 Current Ride
2004 Honda 954 Again (Needed a 2 seater)
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post #5 of 32 (permalink) Old 03-12-2014, 04:39 PM
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If that don't help and you're still worried about the numbers.
Duckie has you covered with all your air intake needs.

Sent from Motorcycle.com App
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post #6 of 32 (permalink) Old 03-12-2014, 04:44 PM
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Yeah, I was going to suggest the same. Carlos now also has both a snorkel & airbox on order with DHC. I love the sound my T1 snorkel & airbox make and it's not slow. A good map is key, but there's nothing wrong with a PCII if the mapping is right.

A 190/55R17 is a tight fit and raises the rear significantly. You might get clearance issues with a 200, especially if you have a hugger but also at the front of the swing arm?

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post #7 of 32 (permalink) Old 03-12-2014, 05:40 PM
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What is the new exhaust you speak of?

Worry more about suspension than hp.....that pays more dividends than any mods.



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post #8 of 32 (permalink) Old 03-12-2014, 05:43 PM
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If you still have the soft rev limiter in use, it will retard the ignition at 9200 RPM.
If you bypass the soft rev limiter, it will allow full ignition advance to the 10200 hard rev limit.

This is usually good for an extra 4 to 5 HP due to the extra 1000 RPM ceiling.
Although this is at the extreme upper end of the rev range.
In town, mid-to-upper range is the order of the day.

I see you're also in Florence, KY.
And while you're near the Ohio river, if you travel south up into the mountains, the elevation can detract HP as well.
For cars, it's usually 1 HP for every 1000' elevation.

Last edited by SubSailor; 03-13-2014 at 02:43 PM.
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post #9 of 32 (permalink) Old 03-12-2014, 06:19 PM
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Out of curiosity how many miles on your RC? Also, are you running aftermarket air filters?

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post #10 of 32 (permalink) Old 03-12-2014, 07:45 PM Thread Starter
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[quote=The Stig;444057]Yeah, I was going to suggest the same. Carlos now also has both a snorkel & airbox on order with DHC. I love the sound my T1 snorkel & airbox make and it's not slow. A good map is key, but there's nothing wrong with a PCII if the mapping is right.

How do I get on the list for this snorkel and airbox? Excatly, my Power commander is so old is still has the 16 pin so I am just going to get new model.



[QUOTE=madbuyer;444097]What is the new exhaust you speak of?

I got a SP1 Mori High mounts last year.



[QUOTE=SubSailor;444113]If you still have the soft rev limiter in use, it will retard the ignition at 9200 RPM.
If you bypass the soft rev limiter, it will allow full ignition advance to the 10200 hard rev limit. This is usually good for an extra 4 to 5 HP.

How do I bypass this soft rev limiter?


Quote:
Originally Posted by Andrew View Post
Out of curiosity how many miles on your RC? Also, are you running aftermarket air filters?
It has 50k roughly and yes, running k&n

2002 Honda 929 Long Gone due to a deer
2005 Honda 954 Gone
2001 Honda RC51 Current Ride
2004 Honda 954 Again (Needed a 2 seater)
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