dsnut not sure!

 

bigdaddy i agree with you 100%. kenz is saying they had bike dynoed three weeks proir with same set up with the exception of the exhaust! they are saying that the carb was on then. bike was at 44.0 horsepower then. had stock header pipe and white bros pro meg, they removed spark arrestor. thats why the said they only needed one run! thats why air fuel was so high initially then adjusted, to the new roon wood full exhaust!@

 

BigDaddy331,

I know you have considerable experience with the Lectron's. What could cause a Lectron to see such an abrupt spike in air/fuel mix then flatten out and stay flat for most of the run?

Ron

 

IT's possible to get a spike like that in any carb on any dyno. Most spikes are due to three things....

1. poorly maintained equipment.
2. huge snap of the throttle and a big gulp of air.
3. wrong carb set up.

I've got to look at the graph again but I think that it was probably a big gulp of air, but never the less.... we've got one of our brothers that needs better service.

My first ever dyno tuning session on an atv that I paid for cost me $90 at a bomb dealership. They installed the big gun, and the CDI. and I installed the tm. They did these things every day, and they had a real good idea where the carb settings should be. 12 runs and 4 plugs or so later they had it dialed in as perfect as perfect could be. The entire session took about 1.5 hrs.

The last tyno runs that I made took about 3 hours. Mario and I racked up about 16 runs between two sleds and it cost each of us 30bucks.

You got straight robbed. Now I realize that the last example is extremely rare, but you got way less than you paid for.

 

it well be my last encounter with kenz, they installled my cams, shim under kit, intake carb, cdi,exhaust and so forth you would think they would want to make sure it was perfect!! i think they think, they are perfect! or they dont just care!

 

You have an HPR motor for all intensive purposes....

nough said.

 

First of all, don't worry about the spike- it's not real. either:
A) they didn't bother to hook up the inductive lead to read rpm (which would explain why it's versus speed, not rpm). The knobby tires could have slipped and caused that air/fuel spike. The hp curve averages, so it would not have been affected.
B) if the inductive lead was hooked up (they should be able to print you a graph versus rpm), it was an ignition spike that didn't get filtered out.


Second, I still there is more power if you richen your needle about a turn. The graph is too lean at peak torque (notice the graph takes a dip at 43mph- this is where peak torque should have ocurred, but the hp curve either took a lean dive instead or the tires slipped at peak torque).

I'd like to see the air/fuel on a better scale, but the top end looks close, but they need to be concerned about power and air fuel throughout the run, not just peak hp.

I can tell you from experience, the Woods pipe wants a whole lot more jetting than the W/B pipe. It might have been tuned good on the W/B, but turning the air screw ain't gonna compensate for wide open throttle on a Woods pipe.

Turn your needle in a turn, then you'll have to raise the idle back up with the horizontal idle screw- if you like it, try another 1/2 turn (just be sure to push up rotate the needle so the flat side faces the engine after the adjustment).

222

 

randall, i would like to thank you for everything, you are great!!! will take advice and only know the info you share will only be better performance. its amazing that people dont understand your ways, you are there for the consumer!! i have talked to you numerous times, along with my wife. you are always the same straight up!!! something that can not be bought!! was waiting for your input will make changes and know performance will be noticed. once again thank you for everthing!! looking forward to that new hpr piston! carlton

 

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