Kris Keefer – Page 100 – Keefer, Inc. Tested

FMF 4.1 Full System Vs. Akrapovic Evolution Full System Vs. Akrapovic Slip On

We recently received the 2020.5 KTM 450 SX-F Factory Edition and after dissecting it for a few weeks, we thought we would test a couple different muffler systems on it. We wanted to see if we could improve upon the KTM Factory Edition’s delivery. The KTM comes with an Akrapovic slip on we thought since…

ByKris KeeferMarch 16, 20200Comments

Garage KiT Trackside

Questions About Av Gas Answered

A Bit of Information About Aviation Fuel Aviation Fuel has been used as a low-cost substitute for high octane fuels for decades. This was more common in the hay days of 2 strokes, due to higher probability of detonation, and thus the change to 4 strokes has seen a decline in the popularity of “aviation…

ByKris KeeferMarch 10, 20200Comments

Bike Brands Bolt-Ons KiT Performance Suspension Yamaha

Pro Circuit Link Arm (2020 Yamaha YZ450F)

I have tried links in the past on previous generation YZ450F’s with less than stellar results, but since Yamaha changed the frame on the 2020 machine, I thought I would revisit a link to see if it helps improves the Yamaha’s feel around the track. Pro Circuit's linkage arms are CNC-machined from billet aluminum and…

ByKris KeeferMarch 10, 20200Comments

Bike Brands Bolt-Ons Husqvarna KiT Performance Suspension

Husqvarna FC450 Triple Clamp Offset Test

The Husqvarna FC 450 Rockstar Edition comes standard with the Husqvarna Technical Accessories Adjustable Factory Triple Clamp. If you’re riding a standard FC450 these clamps adjustable clamps are available through your local Husqvarna dealer for $599.99. The adjustable clamp comes standard at a 22mm offset but can also be moved to a 20mm offset as…

ByKris KeeferMarch 6, 20200Comments

Bolt-Ons KiT

Sunstar Works Triplestar Sprocket

Sunstar is the largest OEM supplier of motorcycle and all terrain vehicle (ATV) sprockets and brake discs in the world. In fact, if you’re on a Japanese machine most likely it came from the factory with Sunstar. Sunstar offers the Works Triplestar combination that is lightweight, looks good, and from what I found out recently,…

ByKris KeeferFebruary 28, 20200Comments

Bike Brands Bolt-Ons KiT KTM Performance Suspension

Ride Engineering Performance Link (KTM 125SX)

My son loves riding his 2020 KTM 125SX, but comments all the time on how he feels like the KTM sits taller than his Yamaha YZ125. When I watch him ride I notice that the rear end of his 125SX kicks him in his ass when hitting braking bumps and when that happens, it makes…

ByKris KeeferFebruary 26, 20200Comments

Bike Brands Husqvarna KiT KTM Performance Suspension

SKF Linkage Seals Part Numbers (KTM 450 SX-F/Husqvarna FC450)

The new 2020.5 KTM Factory Edition and Husqvarna Rockstar Edition come with updated SKF seals in the linkage for less friction and actually do make a little difference on the track. With the updated linkage seals the rear of these new 2020.5 bikes feel freer and give less harshness to the back of the bike…

ByKris KeeferFebruary 25, 20200Comments

Bike Brands Husqvarna KiT Motocross

2020.5 Husqvarna FC450 Rockstar Edition First Impression

Yesterday kicked off new bike season and it was Husqvarna that was first out of the gate. The 2020 Husqvarna FC450 Rockstar Edition launch was held at Glen Helen Raceway and it turned out to be great test day as a lot of the West Coast 250 Supercross riders came out to get their outdoor…

ByKris KeeferFebruary 14, 20200Comments

KiT Tires

Pirelli MX32 Mid-Soft Re-Visit

Pirelli may not be the most popular tire in the AMA Supercross/Motocross paddock, but one look around the MXGP circuit and you will see more Pirelli tires than any other brand. I tested the Pirelli MX32 MId-Soft back in early 2018, but since then, the MX32 Mid-Soft tires are said to have an improved spec,…

ByKris KeeferFebruary 5, 20200Comments

Bike Brands Bolt-Ons Exhaust KiT Performance Yamaha

Yamaha YZ125 Pipe/Silencer Comparison (Pro Circuit Vs. FMF)

For over 10 years the YZ125 engine has remained the same. At one time it was the best 125cc engine around, but in recent years that award has gone to KTM/Husqvarna. KTM and Husqvarna’s latest 125cc engines have a wider powerband and is simply more exciting everywhere on the track. Compared to the KTM and…

ByKris KeeferJanuary 30, 20200Comments