09/12/2012 by Jimmy Shoe
Part Numbers: 2218-1IN, 2219-1E, 2220-2IN, and 2221-2E
The difference between models can seem small, but they make a significant impact on the functionality and performance of your machine. In this month’s Product Spotlight, we’ll focus on camshafts for 2011, 2012 and 2013 models. Hot Cams 2218-1IN, 2219-1E, 2220-2IN, and 2221-2E are specifically designed and tested to improve the performance of fuel-injected KX250F engines and they can be installed with stock valve springs.
The most noticeable improvement on these newer-year models is the lobe design. The innovative design maximizes valve lift that allows for more airflow and produces a noticeable improvement in throttle response and torque output. Designed using Hot Cams’ exclusive camshaft lobe design software, the precision valve lift rate gives open and closing ramps a smooth transition and quiet operation. The ramps on our cams are designed to take up valve clearance gently and slowly so there is less mechanical noise; it’s easier on the parts and provides longer, more reliable performance in your engine.
The chart below represents the torque produced by our Stage 1 and Stage 2 camshafts, tested against stock cams:
You can see where each set of camshafts will increase the torque of the engine. Blue is the original cam, the base line to compare. The green line is Stage 1, and you can see it produces more power at a lower RPM. Stage 2, the red line, produces more power at high RPM. This information is essential when you’re considering what camshaft you need for the type of track you’re riding. A curving, low-speed track would see the best performance from Stage 1 cams and a track with straight-a-ways and higher speeds would benefit from a Stage 2 cam. For more product information or technical questions, give us a shout at firstname.lastname@example.org.