125-200cc More praise for the WB 165

Just buy one I have a 38mm lectron on my cr 165 and after 1.5 hour race of a mix of very fast and very slow no spooge out silencer. I do think I might need to run race gas at 25% because at long wide open sections I do think I hear a little knock so I just shift up but it would be nice to just hold it a little longer so II do no damage. Plug looks perfect I have never seen a plug so overall tan. My bike does have 210 psi compression. I was thinking about trying it on my 2012 ktm 250sx but the bike already brutal fast for mx but I am sure the 38mm lectron would improve it even more

My video ride on the Lectron test ride was 40 + miles of tight trails and I still had almost a 1/2 tank of feul left in my IMS 3 GAL. tank.No reason not to love this bike,even an old guy at the controls can have a blast on the 165.

I was dealing with some knocking issues in the upper RPM due to too thin of a base gasket, so I can't comment on the longer pull. I will say it is much cleaner and crisper down low and overall the power feels more linear.

Slo rider what did you do to stop high rpm knock change base gasket, race gas.

another for slo rider... what gasket were you running?

I was running a 0.5mm. I swapped it out for a 0.8 per Walt's recomendation and all the knocks went away.

When I install the 38 Electron. I will also need to add the .8 base gasket ?

So what is the knock. I hope it not metal on metal and hope a little race gas can up octane enough to stop it.

It is likely "mechanical hammering" commonly called pinging or detonation....it's not metal-on-metal, but you are hearing the metal resonate from shockimpact. You can up the octane (it will tolerate the combustion pressures), lower the compression (will lower the combustion pressure), or retard the timing a bit (will lower the combustion pressure). In some machines / states of tune, just richening it up a bit will eliminate it.

No. Yours probably already has the 0.8 gasket in there. My kit was missing the base gasket so I sourced one from Taskys and ended up with the 0.5.

If you run race gas you will eliminate the knock or even a 50:50 mix will probably do the trick. I run 50:50 mix of pump premium and 100LL av gas. Great combination and relatively inexpensive.

Before I had lectron with a mikuni being very crazy rich and lots of spooge it would still knock at very high rpm with high load. So I will try a 1/3 vp c12 mix with premium should put octane around 97-98 and see how it works.

Just a up date ran a 1/3 vp c12 mix this weekend and bike quit it high rpm knock. It did seem a little less crisp not a lot but a little down low. Did not hesitates just not as crisp right off idle would richen up bottom end help bring back a little of bottom end snap. Thanks for help and hope this help anybody else with this problem since it worked for me.

I do have an issue with High RPM knock

I did put already 2 base gaskets in the assembling but when revving it open to High RPM I do hear the knocking sound

I am limited with my gas choice as I only can buy from the pump premium (octane95) and knowing that the chance is big its mixed with cheaper additives

or buying the gas from the countryside road while riding and that's the 91 octane with guaranteed mixed with cheaper additives

the lubrication I do is 1:40 but I am not revving it all out as the sound is not healthy

low and mid rpm is not an issue its only on the wide open stretches that you want to rev it out and all what I do now is modulating with the throttle

In one way happy that the trails I ride is 95% mid RPM work where the motor shines it best in my opinion

would octane boosters (only Wurth is available here) be an answer? not cheap though

Robert-Jan

Which 2 gaskets are you running?

I tried octane booster in my KTM 200 and noticed no difference.

Octane boosters are a waste of time. The amount you have to add to actually significantly raise the octane rating is close to 50%. Then there are other problems using that much not counting the cost.

2x 0.8 makes it 1.6

never used the octane booster it seems to me not cheap here


Robert-Jan