Currency Displayed in
Below are the available bulk discount rates for each individual item when you purchase a certain amount
● 42.5MM TYPE-1 PGM-FI THROTTLE BODY UPGRADE SET (16410-KYJ-942)
● Yuminashi/Keihin 42.5mm Type-1 throttle body upgrade set for the 250 and 300 engines, which will upgrade the CRF250L throttle body from 37mm to 42.5mm, and the CBR250R/CBR300R throttle body from 39mm to 42.5mm...
● This throttle body accepts all your stock 250 and 300 sensors, the venturi is polished and machined in to a stack to create an optimized velocity.
● This throttle body accept also the Yuminashi TP/IAT/MAP Sensor Block for INNOVA125i - MSX/GROM - Z125 Monkey - C125 Super Cub - CT125 Hunter Cub - etc (LINK).
※ We have also the 42.5mm Type-2 version with a flat, horizontal bracket for the throttle cable, which is more convenient to be used in these compact bikes as pointed out above, perfect also for a CBR250/300R engine swap in these bikes...
※ We also have the size 39.4mm (LINK) and 40.5mm (LINK) available if 42.5mm is too large for your build.
● This throttle body upgrade set is perfect to be installed with a high performance camshaft and can be used in combination with the stock air filter box or a higher flowing air filter type (LINK).
● The throttle body size of 42.5mm is basically based on the throttle body size from the CRF250R, which has a bore diameter from 79mm and has stock from the factory a 44mm throttle body installed.
The CRF250R is cranking 39.0 hp at 12,900 rpm at the Dyno with 18.8 pound-feet of torque at 9,500 rpm at the rear wheel, which is a serious step up compared to the CBR250R engine which delivers 23.7 hp (17.7 kW) @ 9,900 rpm (rear wheel) 21.9 hp (16.3 kW) @ 8,500 rpm 26.7 hp (19.9 kW) @ 8,500 rpm.
Based on the results, we can see and conclude that the 44mm throttle body used by Honda for the 79mm bore is a very well balanced bore to throttle body ratio to produce horsepower, and if we keep the same bore/throttle body ratio (Ratio 1,795) then the throttle body result for the stock bore is 76mm / 1,795= 42.34mm.
※ We have the 78mm piston available (LINK) and also the 79mm bore CRF250R piston size (LINK) for the 250 and 300 engines.
※ The Recommended Retail Price (RRP) above is based on the RRP of the Yuminashi 42.5mm throttle body set in the United States, which retails without sensors for between $165 and $300, so if you are a business owner then considering selling this Throttle Body Upgrade Kit could not just be an asset for your customers, but also for your company...
※ You can find the Business To Business (B2B) discounts below on this product page.
※ If you need larger injectors, then we have them available at the page with this LINK.
● THIS 42.5MM TYPE-1 PGM-FI THROTTLE BODY UPGRADE SET (16410-KYJ-942) INCLUDES:
● OPTIONS AVAILABLE:
● THIS 42.5MM PGM-FI THROTTLE BODY UPGRADE SET IS THE CORRECT SET TO BE INSTALLED ON:
HONDA:
SMART SHOPPER TIP:
※ BUYING MORE THAN 1 PIECE CUT THE TRANSPORT PRICE, AND YOU RECEIVE A 10% DISCOUNT ON TOP OF IT!
※ B2B:
All prices are in IDR