Strm Trpr

Changed my mind. They're too new and I haven't seen much about them.

It'll be late summer before we know. I've got two big rides coming up. Memorial Day weekend and the week of 4th of July. Cameron will have a cylinder ported and ready to go. I'll ship my motor and all he has to do is do the ProMod and assemble it. Need it back at least a two weeks before Labor Day weekend.

I think the biggest concern is not being able to pull enough air thru the tiny K&N's stock carbs use. I may have one of my machinist buddies make a billet manifold that'll bolt up to a pro design billet intake and use that massive K&N that comes with the pro design intake.

RB Designs up in Oregon did the mods. http://www.rb-designs.com/rb_designs_llc_014.htm This is what they look like. From Ron Black of RB Designs: The carb mod has an oval bore at the slide only and most or the cutting is done at the roof of the bore and only about .5mm on the floor.The reason for the oval bore is the slide is only 26.75 in diameter and if the bore was bigger air would leak around it making problems. The spigot side of the carb is then bored to 28 mm and stops right at the low speed circuitry. And then the spigots tapered to 30mm from the nose of the carb back in about 10mm. The actual spigot size where it mounts into the reed boot is 35mm in diameter (this is stock size). I also do a little tapering on the air horn (air cleaner side of the carb) to give better entry. So the opening at the spigot is 30mm and that is about what the rubber reed boot manifold is, very minor trimming needed if at all. These carbs flow a ton and give great performance!

That's what I'm worried about too. If these RB Designs bored stock carbs out perform the 33mm PWK's then I'll grab the Driveline Billet Bowls.

He said for what I want to do with the motor, CPI is the better pipe. CPI's will pull up the face better that Snipers. CPI's are readily available and they're cheaper. Cameron said he has both pipes at the shop and since I'm having this build dynoed, he could do a back to back test!! I also told Cam that I want to run my bored stock carbs and pods. He wasn't very excited about that at all, but said he'd run them against a set of 33mm PWK's to see what the difference is. He mentioned that the stock bowls are small and that I'd be running a lot of fuel through the motor. I said I know, fuel economy is very important to me but then I said you can't make power without adding more fuel and air. So if there isn't much difference I'll keep the stock carbs and run the Driveline billet bowls. Should be an interesting build/dyno comparison about the CPI's vs Snipers and bored stock carbs, stock intakes, VF4's vs 33 PWK's, UPP intakes w/cross-over and VF4's.

Just got off the phone with Cameron, he said CPI's.

I just got word from Gary at SRP and he's willing to get started on a set of Snipers for me know. It is a 12 week lead time, but no more!! $670 shipped!!

Excellent thank you Sir!!

Damn, thanks for the heads up. Didn't you guys have a 4 mil as cast and ported cub dyno day at redline? I found the 10mil dyno chart but can't find the 4 mil charts. Is SRP Gary's screen name?

Looking to build a 91 octane MX ported Serval. I weigh 250lbs with full gear. I'll be running bored stock carbs, Chariot Intakes, VF4's, advanced timing etc.... There is a stock carbed Serval in the dyno room, but the OP's link to the dyno sheet is broke. I pulsed him in the thread to no response. But from what I read, there wasn't much of a gain in power when going to mikuni 38's. Plus, I plan on riding Glamis and St Anthony's this year, so fuel economy is a huge priority for me. I saw the Redline MX ported Serval throw up a bitchin number running VP110, 33pwk's, Pods, VF4's, CPI's and +6* timing. I'm not chasing a big number, I just want a powerful mid to top for destroying the Dunes. I like CPI's power delivery and too shabby of peak rpm. Snipers provide an almost identical power delivery with more peak power and with more over rev. So, Snipers or CPI for this build? Anyone know how long of a wait a set of SBIF Snipers are? Trying to get long lead items ordered sooner rather than later.

Whatever happened with your jetting?

Yeah, that's what I'm thinking too. I'm 5hrs from Pismo, we'l go for a night ride!! I'll be down there May 27-31, July 5-9 and Sept 2-6.

I was thinking about mounting a 6" SR2 Diffused LED light bar on the bars too, but we'll see if that's necessary. 10" SR2 Driving http://offroad.rigidindustries.com/led-lighting/910612 6" SR2 Diffused http://offroad.rigidindustries.com/led-lighting/906692

I'll be running one of these mounted across the stock location.

Pump gas Redline 4 mil stk cyl dune port stk carbs VF3's CPI http://bansheehq.com/forums/index.php?/topic/148961-redline-4-mill-stock-cyl-pump-gas/?hl=redline

Race gas Redline 4 mil stk cyl dune port stk carbs VF3's CPI http://bansheehq.com/forums/index.php?/topic/169881-redline-4mm-stock-cyl/?hl=redline

I've seen dyno plots of stock carbs pushing +80whp.

Haven't a clue but I'm sure your 95whp race gas serval would probably suck the bowls dry by the top of 4th... Lol

Plug chops are done WOT in every gear and hold 6th for a sec or two. Simultaneously pull clutch and kill motor. Safely stop and swap plugs. This is a very safe and slightly rich motor here. http://bansheehq.com/forums/index.php?/topic/186085-plugs/#entry1794800

I'm also gonna pick up a set of billet driveline bowls when they're available.

I didn't pay that.My carbs have been bored for years. I think it was $220 shipped.

Exactly, and if I have to ride like a pussy to conserve fuel, then what's the fuckin point??I'm sticking with my stock carbs. The throat where the slide is, is professionally oval bored to 26.5mm wide by 28mm tall. The intake side is oval bored 28mm wide by 30mm tall. There's more top end for sure!! If you're looking for something similar, or if you want to go to 28mm PWK's then go for it. I've invested in pods, outerwears, 27.5-32.5 pilots, stock needles, toomey needles (came with the bike), and mikuni 5L1 needles and mains from 260-360, plus the boring, so needless to say I'd lose a shit ton of money if I switched carbs. Plus I've seen +80whp out of stock carbs on a dyno sheet on this site. That's plenty of powah for old ass!! Ron Black of RB Designs did my carb mods. http://www.rb-designs.com/rb_designs_llc_014.htm

For me and the way I ride a race gas motor is totally impractical for a Duner. Sandking says he burns 8-12 gallons per day riding Glamis. He's on a HJR Dune Port 4 mil stk cyl running VF4's and 35mm PWK's. Granted he could save fuel by switching to smaller carbs, but why? I burned a full tank of fuel in one 30min riding session with my stock bolt on motor. I would love to be able to run high compression and timing with race gas but I simply can't afford it, and can't haul a 55 gallon drum of VP110 every where I go riding. My $.02....

You guys offering to ship your pipes to Claude for testing are the SHIT!!