Modern Buddy

Posted: **Fri May 14, 2010 12:55 am**

anyone know what rpm the v8 pipe is designed to run at?
ive got a stk bore for now but will have a 123 in a week or so
also-what rpm is the highest safe point for a stk motor

Posted: **Fri May 14, 2010 1:19 am**

I'm not sure about the one that you bought, but my RRGS "V8" style pipe from SWG is optimized for a 123 BBK. The stinger ID on mine is 19mm, which is too big for a stock bore, OEM carb, 106 motor.

I modified a B&S small engine muffler to serve as a supplemental silencer & mounted it on the end of the stinger, & connected it with a short 22mm>19mm silicone reducer hose intended for a turbo application. That got me the torque I was looking for without giving up anything on top.
The supplemental silencer inlet is approx. 17.5mm tapered down to approx. 15.6mm. The "silencer" also took a little bit of "bark" out of the pipe.

The top-end RPM is limited by the dinky OEM carb. I'm personally not sure what the upper RPM limit is, maybe Vespatech & MR can tell us!

All that said, my RRGS likes high RPM.

Posted: **Fri May 14, 2010 1:27 am**

so whats the target rpm for a bbk with a v8 pipe?
every pipe is designed for a certain rpm so if this was made for the bbk does anyone know what rpm? sbm?

Posted: **Fri May 14, 2010 1:35 am**

Not exactly sure; my best guess on mine is about the 7 - 8k range. Maybe Tumon-Ninja can chime in.

Posted: **Fri May 14, 2010 9:56 pm**

i would guess a safe limit on stk motor is 9500 maybe 10,000 rpm I know i have had it revved out pretty far for extended periods to what sounds like 10
The powerband will be around 8-9 with that long of a stroke

Posted: **Fri May 14, 2010 10:05 pm**

i have the v8 pipe works good with stock but i fried the rings three times already by over-revving.....heading to scooter world for the bbk.....

Posted: **Sat May 15, 2010 12:03 am**

guam_rattler wrote:i have the v8 pipe works good with stock but i fried the rings three times already by over-revving.....heading to scooter world for the bbk.....

what rpm did you run it at?

Posted: **Sat May 15, 2010 1:21 am**

dynarex wrote:
guam_rattler wrote:i have the v8 pipe works good with stock but i fried the rings three times already by over-revving.....heading to scooter world for the bbk.....
what rpm did you run it at?

don't really know but i was full throttle for about 5 min. racing a motard......was going about 58 then boom shut down.....made it cool off and it started back up again but now wont go over 43 on full throttle....scooter world said it might be the rings.....

vince

Posted: **Sat May 15, 2010 2:32 am**

Am I the only only one running a Tach on a Rattler?

Posted: **Sat May 15, 2010 2:43 am**

Until I can get some GP gauges... very possible

Posted: **Sat May 15, 2010 2:49 am**

B02S4 wrote:Am I the only only one running a Tach on a Rattler?

interested in running one what did you hook up too?

Posted: **Sat May 15, 2010 12:29 pm**

i have the tiny tach-pretty simple hookup
kinda looks factory too

Posted: **Sat May 15, 2010 12:46 pm**

maybe sbm can chime in?

Posted: **Sat May 15, 2010 3:48 pm**

Waiting to get one of these, It is the stock style readout but that useless button on ours changes to temp rpm and fuel level. comes with everything to install and at under a 100.00.
http://www.sip-scootershop.com/EN/Produ ... ersal.aspx

And i found a cure for the custom intake blues

http://www.sip-scootershop.com/EN/Produ ... RELLI.aspx

THIS WILL FIT

Posted: **Sat May 15, 2010 3:51 pm**

I use my multimeter for rpm testing right now

Posted: **Sat May 15, 2010 4:51 pm**

I am interested to see how those brackets work. I have seen them a few times. Scootercraft also had a subframe on there site. No extension, just able to run a straight intake.

Posted: **Sat May 15, 2010 7:26 pm**

bigbropgo wrote:I am interested to see how those brackets work. I have seen them a few times. Scootercraft also had a subframe on there site. No extension, just able to run a straight intake.

ME TOO THEY LOOK THIN BUT WHAT ABIUT GETTING TWO SETS AND DOBBLEING THEM UP??? THEY MIGHT HAVE TO BE ON MY SIP ORDER!!!PHOTOS WILL FOLLOW

Posted: **Sat May 15, 2010 9:50 pm**

dynarex wrote:maybe sbm can chime in?

You mean SBL?

Posted: **Sat May 15, 2010 10:20 pm**

B02S4 wrote:
dynarex wrote:maybe sbm can chime in?
You mean SBL?

oops sorry
uh yea-that smelly bum guy!

Posted: **Sun May 16, 2010 12:53 am**

guam_rattler wrote:
B02S4 wrote:Am I the only only one running a Tach on a Rattler?
interested in running one what did you hook up too?

This: http://www.tinytach.com/tinytach/gasoline.php

Posted: **Sun May 16, 2010 1:11 am**

dynarex wrote:
B02S4 wrote:
dynarex wrote:maybe sbm can chime in?
You mean SBL?
oops sorry
uh yea-that smelly bum guy!

He was banned from MB quite some time ago. Not sure that he still monitors this forum anymore. Did you get some parts from him?

Posted: **Sun May 16, 2010 1:27 am**

B02S4 wrote:
guam_rattler wrote:
B02S4 wrote:Am I the only only one running a Tach on a Rattler?
interested in running one what did you hook up too?
This: http://www.tinytach.com/tinytach/gasoline.php

thanx looking into if they ship to guam...

thanx again

Posted: **Sun May 16, 2010 3:04 am**

i didnt know he was banned-i thought i saw somewhere that he was the "designer" of the v8 pipe and was just trying to figure out where the hell my rpm should be at for max power

oh and i have the tinytach its cheap and it works great

Posted: **Sun May 16, 2010 3:23 am**

dynarex wrote:...the tinytach its cheap and it works great

My Tinytach is annoyingly laggy, but other than that works well. It sure made dialing in the pilot air screw easier!

SBL commissioned the RRGS V8 style knockoff.

Posted: **Sun May 16, 2010 3:38 am**

B02S4 wrote:
dynarex wrote:...the tinytach its cheap and it works great
My Tinytach is annoyingly laggy, but other than that works well. It sure made dialing in the pilot air screw easier!

the newer version of the tiny tach updates every 1/2 second
its not too bad

Posted: **Tue May 18, 2010 12:27 am**

so does anyone have a clue what the rpms of there ratt are when they have the happy tube twisted?
how can we set up a clutch if we dont know what rpm we are supposed to be at?

Posted: **Tue May 18, 2010 2:30 am**

Mine is generally in the high 6's - low 8's range WOT depending upon conditions.

My clutch is locked up by 4k (my preference), with the lightest clutch springs & no pillow springs.

Posted: **Tue May 18, 2010 2:52 am**

my clutch is locked about 5k engaged at 4k
max rpm is abou 7600-but i back off after that cause im not sure that the stock motor can take the rpms
is it ok to run these things to 8-9k rpm?

Posted: **Tue May 18, 2010 3:12 am**

dynarex wrote:...is it ok to run these things to 8-9k rpm?

OK to burst it there, however I don't recommend running extended WOT at that level.

Modern Buddy

v8 pipe rpm

v8 pipe rpm