I'm not talking any more until you tell us which one of those hotties is you...

 

Let me ask you, how can you believe any of the kind of racing, etc that you want? It is far more subjective than any dyno. Sure, figures can be manipulated, but how are you going to compensate for a three pound difference in riders? How about aerodynamics? A different size rider will have less drag. What if a rider is knees out versus a rider tucked in? One rider shifts slightly quicker, one is slower with the throttle, tire diameters are different. Really, drag racing, rolling start or not, is no more reliable. The results can be unknowingly manipulated by a lot of variables.

Your dyno operator friend is right, he can play the numbers game, but as long as the game is the same when drawing the baseline as it is in subsequent runs, the results are valid. Ask Sure, different dynos may give different numbers, but it is the trend in the sets of results. The numbers for Marcelino may not be the same as KLXter, but the trends certainly were.

If you read Marcelino's thread, he got into the science of cam timing.. The optimum cam timing based on intake and exhaust design is able to be worked out within a few degrees.. Marcelino pointed out the KLX cam timing as stock was more in line with that of a far high reving Ducati engine design versus that of the KLX. That was what got me interested. That same cam timing knowledge was referenced by Joe MInton in his work with the Nighthawk S. Just because the power range doesn't reach as high in the rpm range does not mean it is less powerful in application. Riding off road, you should know that.

Based on the science and the most objective way to compare results, the MCM doesn't neuter power, it maximizes it. What good is it to add 3 hp at the top of the rpm range while losing 3 hp through the middle range? Losing it at the place where one needs power to blip the front end over a rock or log, have a bit quicker passing power. You do realize the big bores usually lose power at the high rpm, right? The stock KLX peaks at around 8600 according to Kawasaki, the 351 peaks out at around 7000 according to BB with stock carb. Does that make it neutered versus the stock bike or just that you work the lower revs?

To sum it up here, apparently you apparently are the only one who wants a run off, most of us don't really care, we know how the bike works before and after. I didn't need a dyno chart nor a drag race to prove to me that my engine is pulling stronger in the range where I ride, I experienced it. If I hadn't I'd have reset the timing back to stock.. I think that is why you don't see a mad rush to meet your challenge, we don't see any value to it so we don't get all excited to do it.

Maybe some day I'll race my brother, who has a 2006 model with stock cam timing and I a 2009, but then our gearing may not be the same, top gear definitely is not, plus I outweigh him by 30 lb. I have chased him around on back roads and on trails without much problem hanging right with him.

 

 

Ok, first I'll repost with highlights - to make it easier for you to read..


It proves that with MCM , you can do things that you cannot do with stock valve timing.......... Just try doing those power wheelies with stock cam timings - it is not possible...


Got it ?

If not, I can just copy and paste this post over and over until you do...

 

Ooh this is getting good a video gauntlet has been thrown

 

Okay, short answer - an on ramp race is pure BS since the riders and bikes are not identical.

Short and concise!

Don't you ever wonder why a rider on a lesser bike wins a race on the same course over a faster/better handling bike? Duh!

 

 

assgas?

 

Sorry you have the wrong person on that. Another rider here hyps it up, not me. I pointed out it improved, a noticeable stronger mid range and up pull. How much I don't know. I actually have the bike because it is far lighter than my much stronger KLX650 and I want to do more off road with a lighter bike. If I wanted to do on ramp racing I'd do the 650. I never bought the 250 with any delusion about power. If I can pick it up a bit I will, especially with a proven free change, but at the end of the day my 650 is stronger. I did the MCM for some free power increase over the entire curve and especially useful in the 5000-7000 rpm range. I do like to play so I have a 300cc kit, a TM36-68, an aftermarket 1.375 ID head pipe, and a Pro Circuit reverse cone megaphone to bolt on when the shop is finally heated. Figure to pick up a bit more oomph based on what some others have done. The 650 will still have more power and kick its butt.

Where you are getting all that crap about the MCM hindering power is beyond me. The bike pretty much revs freely up around 10,000 rpm the way it did stock in spite of the stock and MCM peak power hitting tops at around 8600 rpm, so no real change there. Those who actually did the dyno stuff got around 25+ hp. Marcelino got it with a basically stock EFI Euro bike. KLXter got it with a jetted lidless set up and does rev it harder. The Marcelino mod does not decrease horsepower at the peak, it increases torque over the power band and the pick up in power is right at the range of acceleration for traffic - 5000-8000 rpm.

I played with gearing which affects the bike more than anything else. With the 15/38 sprockets - the biggest road going improvement - the bike would run easily upwards of 65 in fifth, cruising 70 in 6th although acceleration was a bit lacking and obviously that would suck going off road. Off road a 13/47 did good stuff in the MIchigan sand. It would take off really strong, but was reving hard at 65.

Go get another KLX and do your thing. Not that it will change how my bike performs or anything else. You won't find massive change, but I'm thinking you will find change. I still don't see how some on ramp drag race can do it. Different bikes, different riders, different skills, different tires... yep, a real scientific controlled operation there. None of that stupid disorganized same bike on same dyno on same day under same conditions in same gear accelerating in the same manner stuff. For most of us it won't mean jack.

As for fake news, remember how most people, including the president of fake news, get it - they repeat the same thing they think is true over and over whether it is true or not, then eventually start quoting each other as reliable sources and then declare anything that doesn't agree with them as fake news. Funny part is when that "fake news" proves to be true, which it often is.