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Stevo2vabch 05-08-2019 08:53 PM

New purchase, have some concerns
6 Attachment(s)
Just purchased a 2005 450r and I have a few questions that I am hoping someone could give me some insight on. The quad is clean and was to have just been built this winter. Below I have copied and pasted what he sent me as the build sheet.
New powder coat, new bearings, freshly serviced fox fronts and rear axis shocks, Walsh +1 stem, Walsh over flow tank, Gibson +2 long travel a arms, LSR +1 swingarm and LSR link, 06+ fcr carb and air box, crf cam/ignition/stator/flywheel, flexx bars, new dwt wheels front and back, CPcarillo 13.5:1 piston, Hinson clutch system, race cut harness, mishimoto radiator, new plastics, full yoshimura exhaust.

Below are my questions/concerns.

The individual I purchased it from told me that with the mishimoto radiator it’s designed to delete the fan. So there is no fan on it and he told me it doesn’t need one. Anyone know if this is true?
On the FCR carb, it has a little gold knob that comes out under the bottom of the carb on the left side. On the back side of the knob a wire runs up into the carb and it looks like the carb is leaking from there. Does anyone know what this is? My assumption is that it is the idle screw but it didn’t really seem to do much when I adjusted it.
On the Gibson a-arms, does anyone know where I can get replacement ball joints? I can’t find anything on the internet.
Also, anyway to confirm that this motor was just rebuilt without tearing it all apart?

I have attached some photos of the carb and the quad. Thank you for any insight you can give. Really hoping that I didn’t just get jipped.

Brandon79 05-08-2019 10:25 PM

6 Attachment(s)
Nice looking quad. The gold knob that your referring to is actually a R and D Flex jet, dont let the name fool you, your assumption is correct that's the air fuel screw. Makes life a lot easier I think. It shouldnt be leaking from the wire your talking about that just holds it in place. Maybe make sure the float bowl screws are tight.

Not really anyway to tell what's been done internally without taking it apart.

As far as radiator I'm not sure maybe someone else will chime in with an answer for that. Kinda curious myself. I personally would still want a fan on mine though. Wouldn't run it too much until you get a definite answer.

Brandon79 05-08-2019 10:31 PM

What is engraved on the side of the head? Looks like something but pic kinda cuts it off.

Stevo2vabch 05-09-2019 10:03 AM

Hi Brandon79, thank you for your response and the compliments on the quad. The side of the head says M 13. I have attached a photo of it.

Another thing I forgot to mention is that he said he is running 116 octane in it as that’s what it is jetted for. I can attest that when you hit the throttle this thing is a rocket. I had an 05 before that had the motor done but not to this extent and I can tell you that I thought that one ran pretty good but this one would definitely eat it alive. 116 just seems high to me. Sorry for all the questions, I am pretty knowledgable on everything on these except for anything with engine/performance. Engine work I have always had somebody do.

Stevo2vabch 05-09-2019 10:05 AM

1 Attachment(s)
Sorry, forgot to attach the picture.

Thrown Stones 05-09-2019 10:41 AM

Good job on the find. That looks like a nice ride. Mishimoto radiators have a larger capacity. That's probably why there is no fan. Get an in-line coolant, temp gauge. That's a good way to monitor the temps. If your compression is around that 13.5, the 116 octane is overkill. Good luck and enjoy.

hoser 05-09-2019 11:54 AM

I agree, nice looking quad.

The screw that’s leaking was called an air fuel screw, but it’s actually a fuel screw. They are very nice for easy carb adjustment, but it sounds like maybe the o-ring that goes in there under the spring and washer was left out and that’s why it’s leaking fuel, might be worth checking out. You can read about how to tune your carb with that fuel screw by reading the jetting sticky that is at the top of the engine forum where you posted this thread.

I also agree that you don’t need to be running 116 octane, and you could safely drop the octane level and not have to worry about rejetting it.

Some guys remove the fan if they are always moving or racing and get good airflow over the radiator at all times. If you let the machine idle or are doing slower trail rides you might want to consider throwing a fan back in there.

hawk-trx 05-09-2019 07:56 PM

Agree with the guys above, nice quad, 116 is overkill, rd air screw and an idle adjust screw, dropping to 100-110 octane won't require Rejetting

I know nothing about Gibson arms, most use the same joints like houser, JD, lonestar but those look different

Question to hoser on the fuel leak, I have had fuel screws back out and not leak, I was under the impression that the o ring was for an air tight seal no a fuel seal, am I mistaken?

As for the radiator, I have a fulidyne, and a pwr (the ones mishimoto copied) and they hold very little extra fluid (like 4oz more) but neither of my fans come on and by removing the fan it should increase airflow slightly. I also run ESR inline temp gauges and mine don't run over 210 and that's after repeated drag passes.
I will add the instructions from one on my radiators included how to reinstall the fan, but if your harness is race cut you may have to wire from scratch

Stevo2vabch 05-10-2019 07:15 PM

Thanks everyone for your comments and help.

Thrown Stones - I will check into one of those temperature gauges. Any recommendations on brand?

Hoser - Thanks for your help. Do you know if I can you go to a hardware store and match the o-ring up or do you need to order it from Honda? Or does this o-ring and washer not come from Honda and you have to get it from R&D?

Hawk Trx - If I drop the octane to 110 will I really need change/tune much? Also what kind of coolant are you running in yours?

Another thing I did confirm is that this quad has a crf450 flywheel, stator, ignition and cam in it. The carb is from an 06 plus trx450r. Anyone have any experience with running this set up? I can tell you that the thing revs quick and when you punch the throttle it hits hard. I’ve been riding since I was 5 and I am now 36. So when I say this thing rips I’m not some newbie that just started riding or just upgraded to a 450 that’s like “Omg this thing is so fast”.

hawk-trx 05-10-2019 08:56 PM

The only time changing fuel has ever required a jet change for me was with oxygenated fuel, c12, 110, and kemco with 91 pump mixe to 105 are the only fuels I have ever tested on the dyno (and U4 the oxy fuel) my AF readings were all almost identical as were hp readings.

I have found a oring at autozone before, it's not in their normal o ring box but one for fuel/carbs, but make sure you have the washer too and it wasn't lost when the RnD screw was installed.

The best temp gauge I have seen is the ESR

Didn't mean to answer for anyone else just trying to save you some time

Stevo2vabch 05-11-2019 08:27 AM

Hawk-Trx - Thanks again for your reply and help. Do you have a preference for race gas? I used Cam2 in my previous quad a few years back and really liked it. I was running 110. This guy said he was running VP C16 in this one. I plan on pulling the carb off this weekend to confirm that is exactly where it’s leaking from.

hawk-trx 05-11-2019 11:39 AM

I liked Sunoco 110 for no other reasons then the smell,availability and cost. I had an issue with vpC12 and U4 leaving crystals in the exhaust ports when it was stored in the winter. 99% of what I used was pump fuel mixed with kemco octane supreme. It is a real booster that works in full points not 1/10ths tested it on the dyno and made the same power as Sunoco and C12 fo about half the cost. It is still available from wild bills corvette but he has doubled the cost, now I use Torco accelerator which also boosts to 105 octane. Unfortunately it does not have
Tyrethelne lead as a boosting agent. For me it's much easier to use have this on hand then 5gallons of race gas

hoser 05-11-2019 01:06 PM


Originally Posted by hawk-trx (Post 2915714)
Question to hoser on the fuel leak, I have had fuel screws back out and not leak, I was under the impression that the o ring was for an air tight seal no a fuel seal, am I mistaken?

So Iíve been messing around with some different carbs this morning and I have an answer for you! I donít know!! Lol! I always thought it would leak because it meters fuel, but it seems fuel is only metered when under vacuum, so when running it pulls the fuel through and when not running it doesnít, so it maybe wouldnít leak??? I dunno, I am by NO MEANS a carb expert, I rebuild maybe a dozen various carbs a year, so I could be completely wrong.

Stevo2vabch 05-12-2019 02:34 PM

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Thank you all for your comments and help.
I think that I got the leak thing on the carb figured out. There was no clamp on the inlet hose of the carb. See the attached photo.
But now I am running into another issue. It’s taking about 10 kicks to get it started when the motor is cold. Then when you take it off of choke it doesn’t want to stay idling. If I give it some gas right before it’s about to stall out it will stay running but as it will kinda pop and puff a little bit as the isle goes back down. Think that it’s maybe too lean?

hawk-trx 05-12-2019 05:39 PM

Check the pilot jet

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