Drag Bike Build

Justdad said:
Kevin I'll enclose a picture of the 17 inch wheel we ran on Rob's bike..I'm not saying that wheel/tire/ suspension (frt & rear) was the main cause of the crash but I'll never run one again.
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What won't you run, that size, that rim, or that tire? (If you're going to run that rim, I'd beat it straight with a hammer first. )
 
Tripps said:
What won't you run, that size, that rim, or that tire? (If you're going to run that rim, I'd beat it straight with a hammer first. )
Click to expand...
I can't really say. If I was to do it over I'd make sure the bike didn't weave on dry pavement. My first time at speed (164 mph) was on very wet salt which wasn't helpful.

The generation one Rockets from what I've seen will weave a bit (140+ mph) with stock suspension, wheels and tires at least the 2013 model I was riding anyway.

The 17 inch wheel might work but any other modifications to the front wheel, weight distribution, suspension and fairing should be tested with gradual run up speeds.

The gen 2 with stock suspension and tires with a small windscreen was a ***** cat even with the rear wheel spinning up a lot.

Bottom line I don't know if the 17 inch wheel caused or more likely was just a contributor but until I tested it I'd walk it up to speed. Just my opinion, maybe it's the titanium and screws in my arm talking.
 
Justdad said:
Kevin I'll enclose a picture of the 17 inch wheel we ran on Rob's bike..I'm not saying that wheel/tire/ suspension (frt & rear) was the main cause of the crash but I'll never run one again.
Click to expand...
I'm not sure those are for anything but show bikes. How does an aluminum wheel bend on salt? Makes me think the wrong alloy was used or it wasn't properly heat treated.
Aluminum components must undergo heat treatment to improve their mechanical properties. There are generally three process stages: solution annealing, quenching, and aging.

Aluminum Alloys: What Series is Right for Your Casting Needs?

Learn about the different aluminum alloys and their elements, strengths, and uses so you can best plan for your aluminum project.
www.leclairemfg.com
 
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Justdad said:
Kevin I'll enclose a picture of the 17 inch wheel we ran on Rob's bike..I'm not saying that wheel/tire/ suspension (frt & rear) was the main cause of the crash but I'll never run one again.
Click to expand...
If i ever run the salt id want the weight of the stock rim, no since in light rims if youre needing to add 70 pounds of ballast i figure. Im hoping for 1/4mi, mile, gonna help with weight. I certainly hope not to pick up bike and slam it on that rim. i remember seeing that destruction. We will be doing weight calculations, center of pressure and center of gravity to try and alleviate possible effects that would cause a crash. Youlls event will always be fresh in my mind and will always be used for caution and learning. I really have no desire for the salt, i wanna hit 200 at airport racing though. This may will be going for 175 at ecta, baby steps.
 
Ive seen rockets that crashed and stock rims bent, the weecker i bought from skip the rear and front were dented bent. If you crash yeah theres gonna be bent broke stuff. The rim will not just collapse, that rim didn’t bend by itself, the weight of the rocket slamming on it helped id say. I wont run aluminum rim on road as pot holes could possibly damage the rim, strictly track use for me, no off roading.
 
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Justdad said:
Kevin I'll enclose a picture of the 17 inch wheel we ran on Rob's bike..I'm not saying that wheel/tire/ suspension (frt & rear) was the main cause of the crash but I'll never run one again.
Click to expand...
The suspension is something that i take very seriously, i would not attempt to run wide open with stock suspension or suspension that doesnt have complete adjustment on rear, i will be addressing the front forks but my race tech rears have max adjustment, just to have 3 levels of preload is not good on a rocket. I prefer this picture from that event. You are a wild man to have just jumped on that 250hp bull and twist it with little to no regard for self at all, you are a dare devil.
 

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This wreck rim didnt break, it has a very large center core and it held even with the slam to the ground, it hit like a hammer it looks like, but the rim structure is not bent or broke, looks very strong through core, that edge that bent, i wont introduce to a hole at the dragstrip, i hope , gonna be good to go. Will take up to speed with test like you say justdad. I will be running the drag max, youll ran something else corso something i believe, the drag max is for pavement and it sees speeds of 200 to 230ish.
 

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My Touring always had that high-speed weave, I tried a bunch of things, suspected the windshield, I finally took the bags off for a while, it seemed to disappear, but being older and wiser, I didn't push it like I used to. Good to 130 mph, anyway
 
I believe the lighter rim weight will allow you to accelerate faster and increase wheel speed, tire compounds, pressure and launch control will be the keys. Practice and repetition will do wonders. Keep good notes on everything you try, track, date and conditions. Sometimes a small voice recorder allows you to record events while fresh in your mind.
 
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