Version 3 - now re-designed to improve sealing at low and mid-range openings while maintaining excellent top end flow.
Made from very high grade CNC billet aluminium that is renowned for its toughness at extreme high temperatures.
The original and best after-market solution. Beware cheap imitations that are appearing. Material, profiles and coatings may not be the same.
The design incorporates the power-valve 'pin' that is much larger and made as part of the centre blade meaning that it is impossible for the pin to fall into the cylinder, treated with a hard, self lubricating, ultra low friction coating.
Superior life expectancy and operation.
NOTE: Colour of this product can vary due to small variations (within specification) of the compounds present in the alloy. The anodising process reacts with the surface to produce the final colour. All materials used are certified to the same specification. Variation in colour is not a fault, performance is not affected.
In some of our tests we monitored a 6hp increase with good mid-range stability on a standard motor. Results may vary depending on your state of tune and condition of current valves & ports etc.
Uses the original spring. For VJ21 fitment you will also required to buy 4 valve springs and 2 spring retainers.
See http://www.rgv250.co.uk/index.html/_/articles/power-valves-r24 for further set up info.
The price here is for a 250cc set of 4 valves, 4 caps and 6 screws.
RACING PART - See terms and conditions.---VAT is deducted for countries outside the UK
Special clause for parts made by Cougar Red: These parts or kits are designed and manufactured for competition use and are sold "as-is without warranty". The entire risk as to performance and quality is with the with the buyer. It is a condition of our making these parts available that it is solely the decision of each individual, rider, team member or team whether they choose to use any parts supplied and in doing so this absolves The Tuning Works & Cougar Red of any claims including and not exclusively for inconvenience, damage to equipment and/or injury to personnel irrespective of how caused.
Parts are sold strictly for motorsport use. Use on road may violate local laws and parts are therefore fitted to road going vehicles entirely at the owners risk.
If you wish to return this product for a refund you must notify TTW within 7 days of receipt and the parts must be in original unused condition.
It is assumed when ordering or fitting these parts that you accept these terms.
| 3(Displaying Last 20 reviews)
11/09/2015 Macgregor Henderson
My old powervalves were worn so I fitted solid, one piece items. Bike was horrible to ride, no good up hills in tight corners, and impossible in traffic. Purchased some cougar red items, and in combination with arrow exhausts and af1 air filter it was dynoed at 66.46 hp. All low rev issues are gone, all tight, steep hill corner issues are gone, all traffic issues are gone. The cougar red valves picked up an extra 3 hp over the solid ones. The bike (1997 RS250) is beautiful to ride and the power is brutal for a 250 2 stroke, I couldn't be happier.
Mac Henderson
01/02/2021 Daran Leaver
I rang tuning works for a quote and information on some power valve blades for a VJ21 RGV engine. Extremely knowledgeable and I learned something! Cannot recommend them enough, and will certainly be using them for any of my RG and RGV needs.
18/06/2010 Dean Byatt
A cool bit of bling without being out of place. Plus they sound cool when telling mates. :P
