jet kits

[fj11.5]

hi all, will be fitting uni pods to an 88 fj1200 , has 4/1 exhaust system ,, what would be the better kit to go with, dj, or factory pro, easiest to tune/ live with ,, or one of the  cheaper , we make the kit up  for your bike    ,,

[weymouth399]

ONLY mikuni parts for correct sizing. Get a hold of RPM Randy he will get you what you need, you count your time probaly cheaper too.

Bob W

[fj11.5]

thanks mate, i should of just gone straight to the rpm site, but i always find stuff i want 

[yamaha fj rider]

If you go with a jet kit Factory Pro works great.

Kurt

[fj11.5]

excellent, thanks kurt, theyre cheaper than dj too   
cheers
rod

[RichBaker]

Factory Pro, they use Mikuni jets....   

[fj11.5]

thanks rich, we  have a winner two for two, factory pro gets his money  ,,  ill spend my cousins cash for him

[racerrad8]

...factory pro gets his money

Why, please tell me; WHY??


I cannot for the life of me understand why there is the constant need for a "carb kit". I say this because I have tried them all FP, DJ, R/L, HSR being the most "popular" kits. I can tell you they do not do anything different than the O.E. parts adjusted properly. I have drilled slides, epoxied slide holes and made them smaller, needles from other carbs with similar profiles, you name I have probably done it. When people bring or send me race car carbs and a "kit" is installed, they get it back in a bag. They get the O.E. parts reinstalled and 99% of the time they tell me the car runs better and is faster than before I worked on the carbs.

Hmmm, it runs better & faster than before I work on them...how can that be, they don't have a "kit" anymore...

Sure, everyone one of those kits will make your bike run better than stock, because it puts the A/F mixture ratio into the engines sweet spot. Yes, some of them have different needles to change the fuel curve slightly, but unless you are out racing you do not need that change in the fuel delivery curve.

So, eight jets at a cost of less than $30.00, some washers to shim the needles and you have built your own carb kit. You did not have to drill/modify or ruin any parts. You can tune with stock size Mikuni jets just as well as anyone of the "kits" jets, they all perform the same function of metering fuel & air delivery.

Sure, many people on this forum have had a positive result using the "XYZ kit", but they would have obtained the same results with the "ABC kit" as well because they all do the same thing, adjust the A/F ratio to better suit the engine. But they could have done the same thing buying the jets individually and saving money along the way.

Come on guys, it is all advertising...

Randy - RPM

[Pat Conlon]

Randy, I understand what you are saying and I agree, however, on face value....

The Factory Pro (FP) kit comes with Mikuni components, 4 Mikuni pilots, 4 mains and 4 adjustable needles retails for ~$140
However, there is a discount off the Factory Pro retail price:  http://www.fjowners.com/index.php?topic=1350.0

Your individual prices comes out to about $20 more that the FP retail price, and about $50 more than the FP discount price.

The big price difference is the cost of the adjustable needles. So do you really need adjustable needles? That's the question.

What you and DavidR have been saying (for years) and and what I have learned is, no, shims are just fine.

In addition, the Factory Pro kit seems to tune the bike on the rich side.

[soundmindryan]

Why, please tell me; WHY??


I cannot for the life of me understand why there is the constant need for a "carb kit". I say this because I have tried them all FP, DJ, R/L, HSR being the most "popular" kits. I can tell you they do not do anything different than the O.E. parts adjusted properly. I have drilled slides, epoxied slide holes and made them smaller, needles from other carbs with similar profiles, you name I have probably done it. When people bring or send me race car carbs and a "kit" is installed, they get it back in a bag. They get the O.E. parts reinstalled and 99% of the time they tell me the car runs better and is faster than before I worked on the carbs.

Hmmm, it runs better & faster than before I work on them...how can that be, they don't have a "kit" anymore...

Sure, everyone one of those kits will make your bike run better than stock, because it puts the A/F mixture ratio into the engines sweet spot. Yes, some of them have different needles to change the fuel curve slightly, but unless you are out racing you do not need that change in the fuel delivery curve.

So, eight jets at a cost of less than $30.00, some washers to shim the needles and you have built your own carb kit. You did not have to drill/modify or ruin any parts. You can tune with stock size Mikuni jets just as well as anyone of the "kits" jets, they all perform the same function of metering fuel & air delivery.

Sure, many people on this forum have had a positive result using the "XYZ kit", but they would have obtained the same results with the "ABC kit" as well because they all do the same thing, adjust the A/F ratio to better suit the engine. But they could have done the same thing buying the jets individually and saving money along the way.

Come on guys, it is all advertising...

Randy - RPM

AMEN, BROTHER!  PREACH!!  

[racerrad8]

Randy, I understand what you are saying and I agree, however, on face value....

The big price difference is the cost of the adjustable needles. So do you really need adjustable needles? That's the question.

What you and DavidR have been saying (for years) and and what I have learned is, no, shims are just fine.

Well, since we are going on face value, why do the aftermarket "kit" manufactures choose to use other metals than aluminum or brass? I do not know the answer, but I bet you is is because it is more difficult & costly to machine aluminum since it is softer than steel & titanium. So, sure the "aftermarket" needles are going to be cheaper; the are cheaper to make...but they wear out your other parts faster.

So, is it really cheaper...

Let examine...

Why does FP have nickle plated tubes, because metal & titanium wear the brass emulsion tube at a much more significant rate. So they make a plated one to combat the wear on the tube, but the nickle is harder than the metal so the needles have to replaced more often; thus titanium. Also, if you use aluminum needles on the nickle e-tubes, you will see wear in less than a month as they just eat the aluminum needle

Aftermarket, reconfigured needles are not needed for any FJ street bike, so at face value under $30.00 compared to "discounted" price of $97.46 is still as savings. Is there really a savings when you install a different needle made from a different material which causes more wear over a shorter time on the other parts...Nope, it is going to cost you more money.

I know at both rallies I attended last month, several of the guys riding at the front are running carbs, that I built using stock parts, and not a single one of them complained about the performance, economy or price for that matter. There were several guys who inquired about rebuilding their carbs based on the recommendation of those who are using stock parts and enjoying the ride, for miles & miles & miles.

They question is still out there...Why???

Performance, price, convenience...Why???

Performance is not an issue with the proper O.E. parts.
Price is definitely cheaper with O.E. parts design by the carb manufacture, not an aftermarket company as the parts last longer.
Convenience because the "kit" is a kit?

Well, if price & convenience are the driving factors, the complete carb rebuild kits I sell are the answer then. They have the adjustable needles, made for the same brass material as the e-tubes, e-tubes, float bowl gasket, N&S, bowl drain screw, pilot screw set, as well as all of the stock jets. There is not an aftermarket kit that offers you all of those part for that price.

Sure, you are still going to have to spend the money to buy the corrected jets, but again the most you will spent there is under $30.00.

I have those adjustable needles made from the same brass as the e-tubes to make a product that will not wear out as fast as the O.E. parts. And after 3 years in my bike, I cannot see any signs of wear, compared to the aluminum needle in the carb next to it.

I would like to hear...Why???

Randy - RPM

[simi_ed]

I have a complete Factory Pro kit I'd like to sell ... Say $60 + shipping.

[Mike Ramos]

Fellows,
I have to concur with the gentleman from RPM.
Following his advice re: carb settings & jetting has allowed me to put on thousands of [sometime hard] miles without any fueling/carb problems at all.
As have others, I also researched the aftermarket brands, but I am more than satisfied I did not use them.
Mike Ramos.

[weymouth399]

For all that RPM Randy does and contributes to and for this group, you "Place any name here" be grudge a guy to make $20 after he probally told you how to do the job to begin with. 
Most on this list would be screwed, if not for a "very" few people on this list that will share their expertise. Thanks to all of them, from me Snarky . And we would all be screwed W/O Marsh.

Bob W

[Pat Conlon]

^ Yep, I agree. 'Ole Snarky hit the nail on the head....