A friend of mine has a Trail Tech Speedometer and it said he was topping out at 143km. All he has is a 400ex with a DMC Alien, K&N, jet kit. I know its wrong for sure. Is their was way to fix it?
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david_beniuk@hotmail.com
Trail Tech speedometer acurate?
A friend of mine has a Trail Tech Speedometer and it said he was topping out at 143km. All he has is a 400ex with a DMC Alien, K&N, jet kit. I know its wrong for sure. Is their was way to fix it?
Last edited by David; 07-09-2003 at 08:18 PM.
2002 Honda 400ex - 20" Razr2, PRM .190 Engine Skid, PRM Swing Arm Skid, PRM Six-Pack Rack, Twin Air Filter, Renthal RC High Bend, TrailTech Handlebar Clamp, Tag Bumper
Senior Member
You have to make sure that it is calibrated correctly for the size of the front tire that it is installed on, otherwise you WILL have an incorrect reading. Mine is accurate within a couple of mph's.
2000 400EX
- AC dirtscreen front bumper
- DG a-arm guards, full chassis skidplate, & nerf bars
- Pro Armor swingarm skidplate
- Trailtech speedometer
- K&N filter w/outerwear
- ProDesign kill switch
- Elka Recreational series front shocks, tripple rate with SSD and Elka shock covers
- Elka converted rear shock, dual rate with SSD
- Parking brake removed with Lonestar block off plate
- HMF slip-on, powdercoated in black
- Kenda Klaw XC front tires
- Kenda Knarly rear tires
- Stainless steel, solid, wave rear brake rotor
- 42 pilot, 158 main, 4th clip on the needle
- Custom vented airbox lid
2004 Z400 Limited Edition
- '06 Z400 Motor
- '06 Swingarm & Axle
- '06 Front Shocks
- Pro-Design ProFlow Intake with K&N
- Pro Armor Belly & A-Arm Skid Plates
- PRM Swingarm Skid Plate
You Go...... We Go
As long as you set it up for the right size tire it's very accurate. Been clocked by police radar and they both coincide.
2002 Honda 400ex--Yellow
FMF MegaMax II
White Bros. nerfs
Scott grips--yellow
Trailtech Speedometer/Odometer
Dial-A-Jet kit
PRM Desert grab bar
Sprocket Specialists Rear 37 Tooth
Pure Sport Bandit Tires
I (heart) racing
my buddy's pred said he got going 189mph on a motocross track, and we got going like 30 or something pushing it,yeah its tough to calibrate it with all those equasions(sp?)-darren
I ride a 440ex-
JE, Hotcam, Hinson, Barnett, HMF, FMF, Douglas, Maier, Elka, FCR, Lonestar Racing Ceet, Renthal..... buncha other crap that makes it fast and such.
THANKS TO-Fellow exriders' hook ups, Pappy's Performance Coatings
MSN- Darrenkaiser@hotmail.com
Daredevil416ex@yahoo.com...
Moderator
The speedometer is based on a sensor that fits inside the tire, and it counts how many times it sees that sensor go around, and then calculates the speed based on tire size.
If you have a 20 inch tire, the circumference is 5.236 feet. That means the quad moves 5.236 feet for every rotation of the tire (we'll pretend it has perfect traction)
So if the speedometer "sees" the sensor 17 times per second, then it means you are traveling 89.012 feet every second (17*5.236) This relates to 60.69 miles per hour.
However, if the speedometer "thinks" that you have 22 inch tires, it will think that you are traveling at 97.91 feet per second, which is 66.76 miles per hour. All it ever sees is how many times the sensor goes by in a given time. You have to calibrate it for your tire size.
Duncan Racing 340PV, +2 A-arms, +4 LSR axle, and a host of other goodies.
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