Is a jet kit needed for my '86 VFR700?

Hey everyone. I just picked up a really nice used Jardine GP1 exhaust off of a '08 Hayabusa to put on my '86 700. The bike doesn't have any other engine mods other than a K&N filter. My question is: Would it be a good idea to put a jet kit on the bike after I put the exhaust on? I've looked at the DynoJet jet kits and they have Stage 1 and Stage 2 for my bike. It looks to me that Stage 1 would be fine since the exhaust is really the only thing done to it. What other options do I have for jet kits or do I even need one? Any insight would be great.

Here is the exhaust I got:
http://www.jardineproducts.com/prod...BUSA/sfID1/28/sfID2/8/sfID3/30/productID/1177

Here is the DJ Stage 1 jet kit:
http://www.dynojet.com/pdf/1124.pdf

-Tim

 

Forget it!!!..Don't waste your money!!!

I just removed a kit from my VFR and the bike runs way better...

Those companies cannot match Honda's R and D...they are a waste of money and do nothing but waste Gas and foul plugs.

My after market exhaust is fine without it..

Perhaps you need one if you are racing so you don't run lean at high speed but the majority of people don't need them...

Just my 2 cents

 

BTW>>>>I had the Stage one kit your describing

 

IF you find a flat spot between 4500-5500 rpm, you can shim the needles up a bit.

SLIGHTLY larger main jets might a good idea IF you can verify on a dyno.

 

Just got another set in the mail today, Dynoshit kit installed, first step is toss those parts and try to repair the rest of the mess. Theses things are a train wreck.

 

I wholeheartedly agree!!! Wanna screw up your bike...install the kit!!!

 

Toe Cutter good lock;p

 

So....if those dynojest....different stagas.....and all that....dosent really work....on the bike....why they are making them....they r making them.....fore some reason right...? Upgrade the power...better engine.....sound....or somethink....maybe to use more gas...is theere a difference in having those kits.....engine runs more ruf...not stable....?

 

First off re jetting for a different slip-on is not required with these older bikes. When folks talk of re-jetting for an after market exhaust it usually pertains to a full system in which the exhaust tubing is slightly larger diameter eliminates a certain emissions system and has a different routing; something that's rarely available on these bikes. And the reason they make these kits is because most folks don't want to pay for the factory kit that should be used $$$$$$$$. There are some aftermarket places that make a jet kit that is fine for this bike but they are definitely not much if any cheaper than stock. Most like Dynojet have a needle that has no taper and wants you to drill out a hole.

 

no advantage...removed mine nothing but trouble

 

When I was riding mine 750 when it was steal good.....bike worked fine.....loved it.....was going fast from start....for me...and everythink fine...and I guess there is dynojet kit 2.....box got holes and stuf like that.....bike was loud as fuck.....there is 4 to 2 to 1 with some old yousi mufler short like 18 in long and I think the only issue was when bike was parked...the rpm wasent kind a stable.......I'm teling u thing was loud....not nice loud like sport bike but vfr....I guess..

 

Never had normal dyno kit on that vfr so maybe it would sound and run different...don't know