Honda RC51: Discussion of the Honda RC51, Honda SP1, and Honda SP2 Motorcycles.
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05-21-2008, 11:18 AM
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#31 |
Join Date: 07-31-2007 Location: Sandy, UT
Bike(s): 05 RC51, 69' Mustang Mach 1 restomod Posts: 250
Rep:  (10) Rep Power: 2
| Re: Lower temp fan switch I used to have an old Ninja 900 and they were known to have bad fan relays which were expensive to replace. So I just wired my fan into a switch at first and could turn it on when ever I wanted to, but then worried I would forget so I just wired the fans into the headlights so if the bike was on the fan was on, and I never had another problem.
__________________ SKWYD Corpsman UP!! |
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05-21-2008, 6:15 PM
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#32 |
Join Date: 02-24-2008 Location: Fort Collins, CO
Bike(s): 2005 RC51 Age: 27 Posts: 317
Rep:  (12) Rep Power: 1
| Re: Lower temp fan switch  Got one on order at the local Autozone. Will have it tomorrow. Wooohooo |
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05-21-2008, 8:49 PM
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#33 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch you need a smaller oring, maybe your old one is reusable. Also I used teflon tape on the threads.
next time I come to colorado springs we'll have to meet up. |
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05-21-2008, 11:59 PM
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#34 |
Join Date: 02-24-2008 Location: Fort Collins, CO
Bike(s): 2005 RC51 Age: 27 Posts: 317
Rep:  (12) Rep Power: 1
| Re: Lower temp fan switch Quote:
Originally Posted by jzanutto you need a smaller oring, maybe your old one is reusable. Also I used teflon tape on the threads.
next time I come to colorado springs we'll have to meet up. |
For sure.
Not to jack the thread, but do you have an opinion on whether its safe to have the radiator repaired if it springs a leak? Thats what I'm considering for cost effectiveness. |
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05-22-2008, 12:02 AM
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#35 |
Join Date: 04-29-2008 Location: nj
Bike(s): 02 RC51, Audi S4, Laeger protrax 250r(w/ 330 bore) Posts: 110
Rep:  (10) Rep Power: 1
| Re: Lower temp fan switch aluminum welding brother |
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05-22-2008, 12:07 AM
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#36 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch as long as they do it right and the weld sticks as it should. |
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05-22-2008, 12:08 AM
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#37 |
Join Date: 02-24-2008 Location: Fort Collins, CO
Bike(s): 2005 RC51 Age: 27 Posts: 317
Rep:  (12) Rep Power: 1
| Re: Lower temp fan switch Quote:
Originally Posted by beerock aluminum welding brother | Clarify please. Thanks
Chum |
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05-22-2008, 1:10 AM
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#38 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch those radiators are aluminum, so whoever welds it must use aluminum welding techniques. |
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05-22-2008, 9:33 AM
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#39 |
Join Date: 02-24-2008 Location: Fort Collins, CO
Bike(s): 2005 RC51 Age: 27 Posts: 317
Rep:  (12) Rep Power: 1
| Re: Lower temp fan switch Right right right. Theres a radiator repair shop with-in spitting distance of my work. I'm gonna run it down to them today and se how they feel about it.
Thanks |
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05-24-2008, 10:32 PM
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#40 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch so did you get it welded up? Did you get the switch?? |
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06-14-2008, 2:05 AM
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#41 |
Join Date: 03-09-2008 Location: NC
Bike(s): 2002 RC51 1000 Posts: 25
Rep:  (10) Rep Power: 0
| Re: Lower temp fan switch ok yes going to try this weekend  |
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08-04-2008, 11:28 AM
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#42 |
Join Date: 08-02-2008 Location: KY, USA
Bike(s): 2001 RC51 Age: 29 Posts: 62
Rep:  (10) Rep Power: 1
| Re: Lower temp fan switch Going to AutoZone to order mine today. Will be here tomorrow.
Flushing/Replacing all fluids and this will make for a great addition.
..........Thanks to jzanutto by the way. |
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08-04-2008, 2:56 PM
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#43 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch just went for a long ride yesterday, starting at the valley floor it was around 100 degrees. Climbed up a steep mountain pass up to about 5500 feet. During the climb it only rose up to about 205. then once I leveled out at the top it went back down to 198 or so.
later in the day back down in traffic at the stoplights it stayed between 200-205.
I really think the secret on this bike is to just get the fans to come on sooner and not let the temp get up to 218 (stock setting) |
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08-04-2008, 3:15 PM
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#44 |
Join Date: 07-31-2007 Location: Sandy, UT
Bike(s): 05 RC51, 69' Mustang Mach 1 restomod Posts: 250
Rep:  (10) Rep Power: 2
| Re: Lower temp fan switch NICE.
Did you notice any other changes to how your bike ran? (cooler = more power etc.)
Also what mods or add-ons do you have on your bike?
Where did you ride? Lake Hughes?
__________________ SKWYD Corpsman UP!! |
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08-04-2008, 5:17 PM
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#45 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch I rode HWY 168 up to Shaver lake. The other time I rode up to Bass lake I had the old temp switch in and the bike was alternating back and forth between 218 and then down to 205 as the stock switch would open/close with temp. I never really got it hot enough to see a power loss.
They say optimum combustion is around 190 and thats about where it will run now.
Now this morning is was very cool outside, and one the freeway I was running 175f.
hey next time I'm in SLC I will drop by to see you. |
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08-04-2008, 5:19 PM
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#46 |
Join Date: 07-31-2007 Location: Sandy, UT
Bike(s): 05 RC51, 69' Mustang Mach 1 restomod Posts: 250
Rep:  (10) Rep Power: 2
| Re: Lower temp fan switch do you have an SP-1 or SP-2?
__________________ SKWYD Corpsman UP!! |
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08-04-2008, 5:20 PM
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#47 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch 2001 SP-1 |
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08-05-2008, 2:42 AM
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#48 |
Join Date: 03-09-2008 Location: Washington
Bike(s): 03 RC-51 Posts: 109
Rep:  (10) Rep Power: 1
| Re: Lower temp fan switch For any of you guys that have done the fan switch, or the lower temp thermostat, have any of you reversed the direction of your fans?
I know that it has been discussed before, but the stock fans pull air through the rads, it would seem to me that if you were doing anything other than stop and go, it would be more effective to have the fans pushing the air through the radiators. There has to be some speed when the fans are working against the airflow created by the movement of the bike and therefor not being effective at cooling the bike.
I know that you can reverse them by doing something with the wiring inside the fan motors themselves, but there might be an easier and more effective way. I know that the guys on the vfr forums (vfr's pull air just like the RC) have been swapping out their fans for fans from the vtr1000 superhawk. I guess they are only about $30 each and fit right onto the fan motor without any problems.
Last edited by b.miller123 : 08-05-2008 at 3:02 AM.
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08-05-2008, 6:06 AM
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#49 |
Join Date: 05-04-2008 Location: Singapore
Bike(s): '00 RC51 & '05 VTR100F Posts: 14
Rep:  (10) Rep Power: 0
| Re: Lower temp fan switch I guess if you're moving along then airflow should cool motor below fan cut-in temp. Here in Singers its usually at least 85F and 100% humid... but gets much hotter. Now that I've fixed the radiator leak, i run about 190F at highway speeds, but up to 210-220 pretty quickly in traffic. Fitted a manual fan switch (exactly as jzanutto describes) and use on hotter days and in heavy traffic. |
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08-05-2008, 9:29 AM
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#50 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch I should check mine just to see what direction it's blowing. I have never checked it. |
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08-05-2008, 9:37 AM
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#51 |
Join Date: 07-31-2007 Location: Sandy, UT
Bike(s): 05 RC51, 69' Mustang Mach 1 restomod Posts: 250
Rep:  (10) Rep Power: 2
| Re: Lower temp fan switch Quote:
Originally Posted by b.miller123 For any of you guys that have done the fan switch, or the lower temp thermostat, have any of you reversed the direction of your fans?
I know that you can reverse them by doing something with the wiring inside the fan motors themselves, but there might be an easier and more effective way. I know that the guys on the vfr forums (vfr's pull air just like the RC) have been swapping out their fans for fans from the vtr1000 superhawk. I guess they are only about $30 each and fit right onto the fan motor without any problems. | I am picking up two VFR Fan Blades from my local stealership today and they should bolt right onto my RC fans. The pitch is reversed so that they push air out instead of pull it in.
B.Miller you mentioned reversing the motors, you dont need to do anything inside the motor, just cut the two wired going two it and switch the leads. That will reverse the direction that the motors blow.
I am also trying a cooling system reroute today that I paid a guy on eblah for and will let you know how that works too.
I am toying with the idea of ceramic coating my header pipes as well as making my own fan ducts since it is so hard to find them anymore.
__________________ SKWYD Corpsman UP!! |
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08-05-2008, 4:07 PM
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#52 |
Join Date: 03-09-2008 Location: Washington
Bike(s): 03 RC-51 Posts: 109
Rep:  (10) Rep Power: 1
| Re: Lower temp fan switch Quote:
Originally Posted by skwyd I am picking up two VFR Fan Blades from my local stealership today and they should bolt right onto my RC fans. The pitch is reversed so that they push air out instead of pull it in.
B.Miller you mentioned reversing the motors, you dont need to do anything inside the motor, just cut the two wired going two it and switch the leads. That will reverse the direction that the motors blow.
I am also trying a cooling system reroute today that I paid a guy on eblah for and will let you know how that works too.
I am toying with the idea of ceramic coating my header pipes as well as making my own fan ducts since it is so hard to find them anymore. | Is that what that guy on ebay was selling? Plans for rerouting the radiator hoses? |
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08-05-2008, 4:39 PM
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#53 |
Join Date: 08-04-2008 Location: michigan
Bike(s): 01 cbr929 Posts: 84
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch will this mod work t-stat work on a 01 cbr929?? not sure what the difference is between the rc51 and the 929rr. thanks in advance! |
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08-05-2008, 5:24 PM
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#54 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch I would have to check. Can you see your radiator? Do you have a temp switch like the one in the pictures that I took?
Since its an 01 I bet you have the same switch setup as the 01 RC51. |
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08-05-2008, 6:51 PM
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#55 |
Join Date: 08-04-2008 Location: michigan
Bike(s): 01 cbr929 Posts: 84
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch i could not find anything like that sticking out of my main radiator. can anyone check their 929 and confirm? it seems that i cannot do this mod. that bums me out  |
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08-05-2008, 7:00 PM
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#56 |
Join Date: 08-04-2008 Location: michigan
Bike(s): 01 cbr929 Posts: 84
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch it is not in the same spot, but it does have one!!!!!!! it is in the front of the radiator. now the question is. does it have the same thread!!! once i order mine i will tell you guys i have to wait until monday to order it! woohoo there is a glimmer of hope! |
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08-05-2008, 7:04 PM
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#57 |
Join Date: 05-15-2008 Location: California
Bike(s): Kawasaki H2, RC51 Posts: 109
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch yeah its only 29 bucks and I bet the threads are the same.
just be sure to get a smaller oring for it. the original one is too big |
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08-06-2008, 12:45 AM
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#58 |
Join Date: 01-07-2002 Location: Toronto, Canada
Bike(s): 2001 CBR929RE1 Age: 31 Posts: 1,155
Rep:  (63) Rep Power: 8
| Re: Lower temp fan switch confirmed by cross referencing via fiches. 2001 rc and the 929 use the same thermostat switch. 37760-MT2-003 |
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08-06-2008, 7:52 AM
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#59 |
Join Date: 08-04-2008 Location: michigan
Bike(s): 01 cbr929 Posts: 84
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch alright then monday i order it!!! oh boy i can't wait! i'm like a kid in a candy store! |
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08-06-2008, 7:53 AM
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#60 |
Join Date: 08-04-2008 Location: michigan
Bike(s): 01 cbr929 Posts: 84
Rep:  (11) Rep Power: 1
| Re: Lower temp fan switch wait a minute girlfriend gets paycheck tonight deposited......hmmmm.... screw it. i'm ordering it tonight! i can't wait until monday. |
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