Took the bike out today and the weirdest thing was happening. As I accelerate in any gear from 5000-7500 rpm, the bike seems like it has the hiccups and won't really accelerate. I have to turn the throttle a bit more aggressive and get it to about 7700 rpms and then its fine. theres a little popping noise everytime I accelerate throught that rpm range.

Anyone ever experienced this before?
Any ideas what the problem could be?

Bike Model: NSR250R SP PGM3 (MC21)



Bike Info/Mods: HRC Black Box

HRC Reed Valves

HRC Reed Valve Spacers

HRC Reed Valve Stuffers

HRC Full Carb Setting Kit

Tyga Lightened Fly Wheel

HRC RACE Plugs

Dog Fight Stainless Steel Pipes

Bomax Motorsport Modified Air Box

Blue Anodized Quick Preload Adjusters

Dizzy MC21 Race shock.

NHK Adjustable Steering Damper

Honda Magtek Wheels Freshly Painted Flat Black

Tyga Step Kit

AFAM Sprockets 14t Front and 41t Rear

DID Gold 520ERV Chain

Michelin Pilot Sport Tires

HRC Race Break Pads

Heavy Duty Clutch Cable

Stainless Braided Mesh Lines Front and Rear

Posh Digital Temperature Gauge

flat battery perhaps , my old mc16 did similar things with a flat battery

I take it you've not experienced this before? Did you change anything since you last rode it? When did you last ride it?
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

I thought it might been because of the Blue Anodized Quick Preload Adjusters, but then i might be wrong lol

Are you Guest then?
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

lol yes, was just an educated guess

holy monkeys, impressive trickness

but no idea sorry
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

The real question, is what the hell you were doing all the way down there? NSR's should be ridden above 8000!!
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

dont you have problems breathing, that high

No, not if you're running forced air induction with a drilled lid. Works a treat as the cooler air is more dense despite being sparse. The ram effect is maximised at altitude naturally, and use of HRC (high revving contraption) stuffers can also prevent hypoxia when really going for it...
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

right! thats it then. its out with the dremel, turn round the scot russel lid spoiler. not got the HRC stuffers. but i can get away with those things with wings the wife goes on about. all thats left to do is look through my box of assorted power bands to find the biggest one. and its off to the local hump back bridge. anyone know what tyre pressure i should run?

Ooh, that's a tricky one. wets or slicks?
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

sorry dave, no im not "guest" dont know who that is.

with all that honda trickery you can guarantee they wont be from the rainy isle.
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

Dave Ett wrote:I take it you've not experienced this before? Did you change anything since you last rode it? When did you last ride it?

This is my bike, I dunno why it had me as a "guest".

Nope, didn't experience this before. Didn't change anything since the last ride. Last time I rode it was about 1 1/2 - 2 weeks.