Factory Pro HDJ needle jet

[mik_str]

Me again

Firmly in the grips of OCMD and ever trying to discover new ways of making the VTR perform better, I just boxed up my spare set of carbs and am shipping them off to Marc at Factory Pro Tuning. My hope is that he can install a set of his (patented) HDJ (high dispersal jet system) to the carbs. Have a look at the link here: http://www.factorypro.com/products/Fact ... _disp.html

As we all know, anything that improves fuel atomization leads to improved response, power, as well as smoother operation and possibly reduced fuel consumption (the latter certainly not a priority, but hey, if it happens, I'll take it, I give enough money to those parasitic oil companies, lol).

Anyhow, no guarantees it will work as Marc informed me he has never attempted installation on a set of VTR carbs but he's willing to give it a shot. If it doesn't work, my carbs may go to the garbage, but as they are essentially sitting on a shelf unused, it wouldn't be the end of my world.

Will keep everyone posted.

[CruxGNZ]

They make 12 step programs for us ya know

This is an awesome idea! Those extra holes are tiny. Such an odd shape too. Figured it would be a round hole, not a trapazoid. How the heck did they make those?

What are they doing that makes it necessary to give them your carbs? Aren't these just new jets and corresponding needles?

[mik_str]

You use normal needles. The reason for sending them the carbs is that the needle jets are not designed to be replaced, so they have to extract them and then press in the new ones. Given the possible complications, I prefer to pay for some shipping and have the most knowledgeable and experienced people do it (maximize chances of success, which is that I hope to have happen). Besides, I am quite certain that approaching anyone else to do it would result in the inevitable, "you can't do that; they're not designed to be replaced" answer that is so typical when one brings forth a new idea (been there, done that).....

[mik_str]

FWIW, here is what led me on this path initially, the Yoshimura MJN needle


do a search and see......

[sirch345]

You never cease to amaze me Micky with your enthusiasm of coming up with something new to try on your bike
Good luck with it, I'll be watching this with great interest

Chris.

[mik_str]

Thanks Chris. I don't plan on parting with the bike, so may as well use it as a laboratory I love to learn and understand, and try new things, and my VTR has allowed me to learn a great deal. I must say that the satisfaction that comes from trying something (usually based on sound principles) and having it work gives me a great deal of satisfaction (especially when the ever-present naysayers shoot it down).

I must confess I have been thinking a lot about FCR carbs, but given how my bike is now running now with my new airbox lid and X-Wing (actually an H-wing now), together with the potential of this latest venture has calmed my impulses somewhat on that front. However, the Yamamoto titanium 2-1 exhaust, designed primarily to enhance mid-range power (which is precisely where I ride 99.9% of the time, ie. @ 3.5 to 7K rpm)), is really eating away at me....... I recently stumbled int some extra cash as a result of a freelance writing contract, and so that may just tip the scale for me, lol BTW, said Yamamoto (Spec-A) exhaust is claimed to weigh only 3.8 kg.......... (by selling my Akra set-up, the price differential wouldn't be too bad).......

drool on.....

[agentpineapple]

gotta love that system, I know this might be controversial, but I love the single exhaust look, it will be interesting to see what you will get for your akra system, good luck with the jets mick.....

[mik_str]

thanks oh citrous one

2-1 is not a done deal yet, but these have a habit of becoming fait accompli in my universe, lol

[NZSpokes]

Besides, I am quite certain that approaching anyone else to do it would result in the inevitable, "you can't do that; they're not designed to be replaced" answer that is so typical when one brings forth a new idea (been there, done that).....

I get that a lot to. Yes they can be replaced. Done them a few times. Drift it out and a new one in. Bandits eat them every few thousand Ks. Then you get over fueling.

[lloydie]

Very interesting keep us posted

[sirch345]

Thanks Chris. I don't plan on parting with the bike, so may as well use it as a laboratory I love to learn and understand, and try new things, and my VTR has allowed me to learn a great deal. I must say that the satisfaction that comes from trying something (usually based on sound principles) and having it work gives me a great deal of satisfaction (especially when the ever-present naysayers shoot it down).

I must confess I have been thinking a lot about FCR carbs, but given how my bike is now running now with my new airbox lid and X-Wing (actually an H-wing now), together with the potential of this latest venture has calmed my impulses somewhat on that front. However, the Yamamoto titanium 2-1 exhaust, designed primarily to enhance mid-range power (which is precisely where I ride 99.9% of the time, ie. @ 3.5 to 7K rpm)), is really eating away at me....... I recently stumbled int some extra cash as a result of a freelance writing contract, and so that may just tip the scale for me, lol BTW, said Yamamoto (Spec-A) exhaust is claimed to weigh only 3.8 kg.......... (by selling my Akra set-up, the price differential wouldn't be too bad).......

I understand where you are coming from on trying something new. It's a good job there are people who think like yourself
As well as this subject, I found that X-Wing thread of your very interesting too.
Some hard decisions to be made there on the exhaust system

2-1 is not a done deal yet, but these have a habit of becoming fait accompli in my universe, lol

You're not wrong there

I'm looking forward to hearing about how it all goes

Chris.

[tony.mon]

The theory certainly stacks up, post up those results, my good man!

[mik_str]

you know I will Of course, this depends on whether or not Marc can actually get the installation done (otherwise it will cost me a set of carbs.... teh sacrifices we make for science, lol). Also, if he can get it done, things shift to when I can get them in and calibrated. Being in the Great White North, our riding season is winding down (rather rapidly it would seem) so the actual seat-of-the-pants results my have to wait a few months (next spring). Either way, I will keep everyone informed.

cheers

[tony.mon]

The dyno shop opens all year, doesn't it?

[VTRDark]

Yep needle jets can be changed. I think Keihin make different sizes for richer or leaner. The same for the air bleeds/jets too, these can be changed if one wanted to.

Very interesting, I've see them on FP's site before but never realised that they made them for the VTR carbs. I look forward to your results with them.

(:-})