I wouldn't expect to much from just a slip on.
Apart from it being louder.
The GTR stock exhaust pipe is only 1.25"
That is the main restriction exhaust wise.
You could drop Gocartacus a line...
he has one from MRP on his GTR
Jackster _________________ Buggy: Carter GTR 250 all black.
Mods: Mikuni TM33-8012 flatslide + custom manifold. MX-filter, Hit Clutch, Mallosi Red Main Spring + 7mm shim, 18gr Sliders, Iridium sparkplug, Custom front and rear shocks, Heavy duty front struts. In-ex snorkel.
You wont have much gain other then noise with a slip on or after market unless you uncork the intake side....Gotta ditch that air box if you have not already and rejet the carb to get decent exhaust gains.
(if the air is flowing in through a straw putting a big ole garden hose on the end isn't going to flow any more air through that straw...get my drift?) _________________ Darren,
Buggy Junkies
Too much power is almost enough!
Yes my intent was to get a new carb but heard cables may be a problem to get right so I think I may rejet the stock carb and add a uni filter to that as well. just don't want to spend the $$ if it's not going to be worth it
With a uni rejet and exhaust you will get a good performance gain everywhere in the power band. Climb better accelerate better and more top end. _________________ Darren,
Buggy Junkies
Too much power is almost enough!
The cable isn't going to be a big problem.
It's the intake manifold you have to redo.
Most carbs won't fit flanged stock intake.
But with some research into the right parts.
Pic below shows my GTR fitted with a Keihin PWK28 slide carb.
It's quite doable and doesn't costs you an arm and a leg.
I think I didn't pay more than 150,- for the lot, intake filter, needles, jets. Including the carb itself (from e-bay).
Better bang for your buck than a muffler that's for sure
_________________ Buggy: Carter GTR 250 all black.
Mods: Mikuni TM33-8012 flatslide + custom manifold. MX-filter, Hit Clutch, Mallosi Red Main Spring + 7mm shim, 18gr Sliders, Iridium sparkplug, Custom front and rear shocks, Heavy duty front struts. In-ex snorkel.
Shrug, , with a mandrel bent exhaust and muffler uni air filter jets and 21 gram sliders my zero to 40 mph dropped by 7 seconds and my top speed is 54 mph compared to 47 mph stock. No carb is going to do even half that granted this costs more. Was on a hammerhead, although you should get similar results if you don't just do a slip on. _________________ Darren,
Buggy Junkies
Too much power is almost enough!
You're right... do the full system.
There's not much to be gained from a slip-on.
Not to debate you, but I know exactly what a flatslide carb can do for this engine (or any engine). Of course combined with a matching exhaust system it will be even better. After all it's no use blowing it out of a big hole if you're sucking it in through a straw. And vice versa.
On a GTR the stock carb and exhaust are closely matched.
Both quite restrictive. I guess to meet the 2 year warranty claim. I highly doubt that even a full system will do for the GTR than what it does for your Hammerhead. Different engine and different stock carb (roundslide not CV)
But if you need to start at one end... I would pick the intake system.
Jackster _________________ Buggy: Carter GTR 250 all black.
Mods: Mikuni TM33-8012 flatslide + custom manifold. MX-filter, Hit Clutch, Mallosi Red Main Spring + 7mm shim, 18gr Sliders, Iridium sparkplug, Custom front and rear shocks, Heavy duty front struts. In-ex snorkel.
I believe the difference in the carb sizes are so minimal if in fact his stock carb is 30 mm and upgrading to 32 mm that performance gains will be small because the 30 mm can just increase velocity on the intake to match flow of the slightly larger carb. Although you will gain throttle response with the performance carb. Ultimately you want the most velocity on the intake and exhaust without restricting flow. Its not always simple to find the balance but that's where the max performance is. If you get it just right you can achieve more air fuel mixture in your piston then the volume available. Similar to a supercharger or turbo effect only a lot smaller maybe a half pound of boost. Its very difficult to find the balance most people resort to bigger is better because that is what we where told in old school performance. I know I was... Bigger is better is the easiest way to gain power but its not the best. Velocity helps keep the mixture in suspension for a more efficient burn for the same volume of a slower moving mixture. On the exhaust side assuming your not restricting flow velocity helps by creating a vacuum and scavenging out the piston and not just relying on the piston movement to push out the gas as it takes energy to push it out. _________________ Darren,
Buggy Junkies
Too much power is almost enough!
Jackster has gotten some pretty big gains on his GTR. The problem with the MRP exhaust mod is that there is no header available, so you still have the restricting pipe. GTR owners are pretty much left with having headers custom made, but what size should we go for, is my question? Jackster seems to have gotten better gains from his 28mm mikuni than the 30mm MRP carb offers.
Also, if I remove the airbox, but leave the same filter(it's a uni-style filter on a GTR) will I have to rejet? _________________ Carter Brothers gtr 300
18g sliders
red malossi main spring
malossi delta clutch with red springs installed
not yet installed:
mrp exhaust
mrp 30mm carb
k&n filter
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