what would you do?

[notmalcomsmith]

the first thing I would do is pray. have you accepted jesus christ into your life?

[BDP-381]

Oh boy!

[jmtracing]

Oh boy!

oh Jesus here we go

[Shawn36]

Man. Is it just me and my 1986 mindset? Motocross has always been 95% rider and a stock bike that works properly was good enough for the rider to do his part. Suspension was always more important than engines anyway. Money is much better spent on gas and practice day entry fees. But then again, I've been out of the loop for awhile. Who needs a dyno. If the bike feels like it should and and the rider is getting pulled in the straights, get on the throttle earlier in the turn and brake later on the next one. Corner speed and line choice is the key. Optimum jetting can change from conditions and atmosphere every ride. Knowing your own bike is part of the game.

I can see it from both sides really. Back when I actually worried about results in the late 90s I was a guy who needed a dyno for any extra hp I could get. I was 6ft and 160lbs worth of kid racing against others my age that weighed in at 120lbs or less on 125s (guys like Travis Elliot, Chase Reed, Johnny Marley). At a certain level you need all the help you can get because it's REALLY difficult to pass someone around your speed but 40+lbs lighter.

But bottom line if this guy simply wanted to know what his bike would do on a dyno, he definitely got robbed.

[spanky]

If you knew that it was a bad idea to dyno your bike with knobbies, then why did you take it to them like that, and why would you put a new tire on it just before you have it dynoed? if you dropped a bike off and ask for it to be dynoed, then it sounds like they did their job. if they were to take your wheel off, break your tire down, put a street bike tire on, reinstall it, thn change it all back out again, that would be another 80-150$ or more, (if a tube didnt get pinched, and depending where you go) you would then be complaining about being ripped off for that reason. as far as the bog goes? that was more than likely a pilot screw adjustment, and with the 30-40 deg change... daily in tx. you better know how to adjust it, and as far as the dyno readings, hp can vary quite a bit from one machine to another, so that dosnt really matter unless you want to frame them to hang on the wall.

[Kasberg187]

get 'em spank!

[CamP]

If you knew that it was a bad idea to dyno your bike with knobbies, then why did you take it to them like that, and why would you put a new tire on it just before you have it dynoed? if you dropped a bike off and ask for it to be dynoed, then it sounds like they did their job.

Most shops with dynos know that you can't get reliable results with a knobby and will discuss this with you prior to any testing. Some even have rear wheels for popular models already set up with a street tire. The least the operator should have done is communicate with the customer that his new tire will get shredded and his dyno results will be low before putting it on the dyno.

[MxRacer]

This is one of those tough deals. I often times get someone who wants me to get in the middle of something that was started at another shop.

I won’t even mess with it anymore.

Best advice I have is to start and end your service at the same place.

Have a builder dyno the bike before and after for you if you want true to life numbers. All the dyno does is let a motor builder know they are going the right direction. You’ll never win a race by having the bike with the best dyno print-out. Having a motor with a nice powerband and usable power will beat peak power any day of the week.

You might try Piper Performance for good honest dyno numbers. He probably has the best database in the area of real horsepower numbers. I use his dyno anytime I am looking to measure real numbers. A couple of years ago I built a couple of KTM 65’s for a customer who was unhappy because his buddy in Houston had a KTM 65 that showed to have 2 more horsepower than the bikes I build. After I finally calmed the customer down I suggested he take his bikes to the shop where his buddy got his dyno’ed in Houston. He did and low and behold they produced right about 4 more HP than up here. The real difference was the dyno. And, he was happy as now he had 2 more HP than his buddy.

To me the dyno numbers mean nothing unless you compare apples to apples on the same dyno with the same tire in similar weather conditions with the same fuel before and after the work is done.

So I gotta ask……. Did “you” get any faster after the dyno numbers improved?

[greg29]

Todd said it best. running a dyno is easy reading the dyno and translating it to on track performance is totally different. Todd's comment about same dyno, weather, fuel, tire, gearing, jetting, is 100% correct from what i know about dyno runs. sorry you had problems but now you know.

[yzf225]

The motor that was in the bike and the motor that I had built were 2 seperate motors. They one removed was stock bore 250f the new built motor is a stock to start and then the parts added were +3 stroker crank balanced with athena 290 piston, 290 athena kit, complete new head ported, hot cams, dlc buckets,ti valves, etc

So my interest in to have dyno test done was to see what kind of HP TQ the motor was making and were it was on the power curve, Because these motors make power at the oppisite ends each other. I was curiouse to see a close idea of what the top HP was and TQ.

As far as the tire concern they informed me that they had another rim with dyno tire on to run it. Because I had offered to bring a diffrent rim that I didnt mind getting scrarch up changing the tire out.Apparently they didnt have the correct whell spacers and made the decision to run the knobby instead of calling to ask. I was told they wouldnt do so.

[TheMilkman]

Yeah. I'm thinking it was Piper too. You've mentioned them in a past post for getting race fuel there...and I'm thinking any place close enough to get race fuel at is close enough to get a dyno. Just come out and say who it was so we know not to go there.

[spanky]

The motor that was in the bike and the motor that I had built were 2 seperate motors. They one removed was stock bore 250f the new built motor is a stock to start and then the parts added were +3 stroker crank balanced with athena 290 piston, 290 athena kit, complete new head ported, hot cams, dlc buckets,ti valves, etc

So my interest in to have dyno test done was to see what kind of HP TQ the motor was making and were it was on the power curve, Because these motors make power at the oppisite ends each other. I was curiouse to see a close idea of what the top HP was and TQ.

As far as the tire concern they informed me that they had another rim with dyno tire on to run it. Because I had offered to bring a diffrent rim that I didnt mind getting scrarch up changing the tire out.Apparently they didnt have the correct whell spacers and made the decision to run the knobby instead of calling to ask. I was told they wouldnt do so.

if they said they had a tire to run on it, but then they used yours... then that sucks, and its bad business. sorry i didnt catch that in your first post.

[Kasberg187]

spank, you wuss.

[spanky]

spank, you wuss.

haha im pretty sure he didnt mention that, i was jusy say'n... btw whos a wuss? Mr no-show! to cold for ya?

[mxtapout]

Thats a really crappy deal any one who has a dyno know's better than that! I can see why you be interested in knowing what kinda ponies that motor would bring! Hell I am wanting to know and its not even my bike! If I pm you would you tell me the shop that trashed your tire and stole your money because thats what that was stealing. Wonder how people like that sleep at night? Sorry that happened to you dude.....