Pressure Regulation

[bnasty]

Hey guys...

I went through one night and replaced all my fuel line in the Hurricane and SLT750, totally forgetting to recover and reinstall the fuel return line pressure regulator. I have only found one of them, and I figure if Im going to have to order one, may as well get two!
As a solution to this, I called Atlantic Jet Sports, and they offer a quick release inline fuel restrictor for about $20. This is the type that you screw carb jets inline. My question is this: Has anyone used this product before (Made by HotProducts), and what size Mikuni jet should I put inline (Different jets for the 700 and 750??)? Keeping in mind that the Hurricane (700) is totally stock, and the 750 has been converted to a three outlet fuel pump.
Recommendations would be great!!

[K447]

Not all years/models used the inline restrictor, some models have it inside the last carb's fuel return.

There are several threads discussing these restrictors. Do a search.

I think the normal starting point is a Mikuni 90 main jet. The best approach is to tee in a pressure gauge before the restrictor (or after the fuel pump), and verify idle (2PSI) and WOT (4-6PSI) fuel line pressures, then remove the tee and know the pressure is correct.

[Keddano]

SAVE YOUR $40.00,Make your own, Post #13
http://greenhulk.net/forums/showthre...ght=restrictor

[xlint89]

Pretty sure your Hurricane Keihin carbs do not use the restrictor. Check in the manual posted in the tech section.

[bnasty]

Absolutely, that may be the reason that I have only found one restrictor so far!

On that note, why is my hurricane bogging from idle to mid-throttle, and dying from WOT to no throttle?? This didnt start happening until I rebuilt the carbs, replaced all fuel line and filters, and installed Boyesen pro reeds? Seems kinda strange. It has about one season on the new updated ignition/stator, and no other major issues to date.

[bnasty]

And Keddano, excellent idea! That way I also do not have to wait about a week and a half for them to get them to me!! Thanks!

[ph2ocraft]

Are all the new fuel lines clamped and not tie wrapped?
Are the lines routed correctly?
I'd pull the carbs and have another look, can you check the piston wash and see if one cylinder is running lean?

[bnasty]

Yes, all the fuel lines are clamped and not tie wrapped, and as far as I know the fuel lines are routed correctly, but I will check again to be sure!

[bnasty]

Okay, and I spent a total of about $30 today getting all the fittings and such to make the pop-off tester, and for the fuel restrictor. Im having a hard time finding the correct pitch of the tap to make the threads on the inside of the double barb connector. The only size I found was a 5 x .80, and the instruction sheet calls for a 5 x .75.....

I will test the compression, popoff, and install the fuel restrictor this weekend! Totally pumped bro, cant wait...

[seaobin]

doesnt need to be tapped IMHO. Just drilled out to accept the jet. Pressure will hold it in place. maybe a little (stress little, tiny, touch, bit) or adhesive to stick it there