Author Archives: admmngr
KTM 125 type 2003 brake hose problem
On these pictures we show you a small brake fuel problem that occurred with a brand-new KTM 125 type 2003. It’s a small thing, which however can bring great damage to bike and rider and could have nasty consequences for your wallet also. At the KTM 125-03 that is new delivered Meer / More →
KTM Tips
A regulator stop for the acceleration pump of Keihin. Already longer in use at Yamaha but now also useful on KTM the tip of fourstroke-goeroe Brian Kinney who on the bikes of Yamaha’s Tim Ferry mounted this attachable stopper on the acceleration pump of the Keihin carburettor, which works damned good. Meer / More →
Heavy Clutch set for Yamaha YZ85
Whenever we at He-Ja Motortechnics tune-up the Yamaha YZ85 to give it more torque and top end, we normally run into problems later with the clutch slipping trough. It occurs that the normal package can not handle the improved capacity (27 brake horse power on a accelaration-test). Among other this Meer / More →
New Heavy Clutch set for Suzuki RM85
Whenever we at He-Ja Motortechnics tune-up the Suzuki RM85 to give it more torque and top end, we normally run into problems later with the clutch slipping trough. It occurs that the normal package can not handle the improved capacity (27 brake horse power on a accelaration-test). Among other this Meer / More →
Yamaha exhaust height valve problem
Enclosed a photograph, where we show you how we make the tension of the torsion spring stronger which is controlling the axle of the exhaust valve. What happens, The, exhaust altitude valve of the Yamaha YZ 125-05 rattle in some cases resulting in quick wearing of the whole thing, followed Meer / More →
When at He-Ja Motortechnics we get the small KTM 85cc in our hands, right away in the beginning we run into problems, were it concerns the crankshaft, which is not produced in the standard we would like it to be. What is the problem? In the new models of the Meer / More →
Small Yamaha problem
Herby a picture from a crankshaft of the Yamaha YZ125 from 2005, after being modified on the rotating machine. After this modification we take it that we have left and right obtain the most equal weight on both sites to avoid vibrations (which means losses). Also we have modified the Meer / More →
Yamaha Flyer
At the left a picture from a He-Ja Piston from the Yamaha YZ125 from 2005, which we have prepared, and by now has run more than 10 hours. Look very careful at the beautiful size of the combustion on the piston. We have mounted a 490 main jet in the Meer / More →
Yamaha YZ125 big-end cups fall out
The two shove’s which are mounted in the Big-end pen of a YZ125 can come out, when the Crankshaft needs to be worked on or modified. A small knock on the site of the pen, can already lead to the fact mentioned. It can best be tested on a stabile Meer / More →
Honda CR250 (2005) problem
Enclosed a photograph of adjusting the variable altitude flap of the CR250-05. To improve the torque in the bottom we have modify the valve data in consideration to the standard one. On the Dyno test bench we found that a measure of 12 mm between the lower part couple bolt and the Meer / More →