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Post by Storms Racing 77 on Aug 5, 2010 20:53:55 GMT -4
The keyway is what lets your crank spin with your flywheel, theres a slot cut out of your crank tip that fits a small moon shape like piece of metal, kinda like the shape if you cut a penny in half, and you flyhweel has a cut in it aswell, the keyway site far enough out to hook into both these grooves and let the flywheel spin with the crank. and i'd set the one brush thats at .004 at .006 to be even with the other one. and if the motor does have a valve problem, i wouldnt know the extent to fix that. but if it was id just go out looking and find yourself a 11 hp engine and throw it in your mower instead. alot less headache and more power off the bat for yourself.
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Post by Storms Racing 77 on Aug 5, 2010 20:56:20 GMT -4
but as for your coil though, use the sandpaper, very easy way to set them both even and have a good space.
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Post by Thomas M on Aug 5, 2010 20:59:06 GMT -4
Alright, i'll give it a go what number grit would you recomend i use tho? And about simply changing the engine in if it is a problem that's just not worth the work to fix, wouldn't that go against class regulations? I thought everything had to be OEM?
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Post by Storms Racing 77 on Aug 6, 2010 13:53:39 GMT -4
I'd say 180 or 220 grit. maybe even 120... and no it would not go against class regulations, as long as its an 11hp flathead unmodified engine then it is legal in stock mod class regualtions.
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Post by Thomas M on Aug 7, 2010 19:28:05 GMT -4
Yay! It worked! Thank you so much for your time on this Steven!
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Post by Storms Racing 77 on Aug 8, 2010 8:59:22 GMT -4
Not a problem at all Thomas, glad you have it running. if you have anymore questions, feel free to ask them on here, theres always someone who will give you advice.
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Post by Thomas M on Aug 9, 2010 14:27:46 GMT -4
This is weird... Ever since i got it running after sanding the brushes i havn't been able to get my engine to rev up all the way like it used to. On the dash of my machine there's a little lever marked choke, run and slow. I've stopped using the choke on it and have been starting it in the "slow" position, after a 30 seconds or so i start to gradualy move the lever up closer to the "run" position, the engine revs higher and higher but before i get it up all the way the engine stops running... I asked someone at a go-kart dealership about it and he told me that the jets in my carburetor might be laced with dirt, restricting the flow and preventing my engine from getting in to the higher revs. I gave the jets a good squirt with carb cleaner and tried again, no better...
I'm thinking that the carb is letting in too much air and not a high enough concentration of gas so i'll just tweak the air intake flap to let in a little less air and hopefully all will go well after that. I'll also get a gas-pedal together so i can take the governor out of the question. Please give me any other suggestions on what may be causing this and if i should be doing on what i plan on doing!
I've noticed that i don't have a fuel filter! I'll be getting out some time soon to buy one and install it. Is there any specific type that should be looking for?
Thanks!
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Post by Storms Racing 77 on Aug 9, 2010 17:32:56 GMT -4
I thinks it is the carb with dirt in it. just my opinion. and id keep your carb how it is, i dont think u can be letting in to much air with stock carb.
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Post by Thomas M on Aug 9, 2010 18:12:34 GMT -4
Ok i got the fuel filter installed... I'll give the carburetor a good cleaning again lol... i don't think i've been doing it right :s
Just wondering... Would it be safe to run the engine without a muffler on the exhaust pipe? Besides it being verry loud, would it damage the engine at all?? The old muffler on my mower is making realy weird noises and i can't find a new one that would fit!
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Post by Storms Racing 77 on Aug 9, 2010 19:42:56 GMT -4
Thomas im glad you asked that about the exhaust pipe run it without a muffler, we all do, straight pipe exhaust, very noisy very fun lol it wont damage your engine as long as its not to short, you want over 7 inches of exhaust to be safe, it gives your motor back pressure so its doesnt hurt your valves. you can make it longer if you want, your exhaust is your idea on what you want to do with it, but long is better, if you have the knowledge you can bend and weld your own to the stock one to fit all the way to your runnin board, i use condoit pipe on my twin and its a nice thin wall easy to bend pipe. but like i said your exhaust design and material is all up to you. Steven
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Post by Thomas M on Aug 9, 2010 20:44:50 GMT -4
HAHA! You're right it is noisy n' fun lol! I got it running at full-rev now... Yay... Took it out for a little scoot in the backyard and had a blast lol And i still have the governor attached! Can't wait to finish up with this thing! With the way things are going i may be able to get out for a couple of races this season! You might see me at the Stirling fair, maybe with my tractor, depending on if my mother is available lol. Tomorow i'll be spending the day doing all the modifications you had suggested Steven. It's too bad i live out in Nepean... You're pretty much not alowed to have fun here! I've got nowhere to go full-out with my tractor!
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Post by Thomas M on Aug 11, 2010 14:30:42 GMT -4
So i've put together a nice throttle control out of an old bicycle's brake lever and cable and mounted it on my steering wheel. It works great! I've unhooked the governor like you suggested and now it's reving nice and high lol. Engine backfires a bit if i don't let it warm up long enough, not sure if that's something to worry about?
I'm thinking of swapping my pulleys around (big in front, small in back). From what i've heard it realy gives your mower some extra speed and i guess it's the same principal as the gearing on a bicycle? What would be the ideal sizing for the front and back pulleys?
Thanks!
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Post by Storms Racing 77 on Aug 11, 2010 14:41:04 GMT -4
Awesome job Thomas! glad to see your right at work with your racer, hopefully you'll come to stirling, i wouldnt mind meeting you, you seem like a pretty ambitious person and fairly knowledged person. and you could get a look at alot of other machines and get some personal info from alot of other racers instead of just me lol . and backfiring isnt a huge deal, its probably only backfiring tho when its just screaming right? and yes big in front and small on back. dont go to big on the front tho or your motor will just die from not having any bottom end, but on the back i suggest going to princess auto and getting a pulley size of 2.7 inches, or 3. and then the front is up to you, gearing is experimental, i still havent figured out my gearing perfectly for my stock mod lol. and i've been racing it for 5 years LOL
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Post by Thomas M on Aug 11, 2010 18:06:07 GMT -4
That sounds good. If i were to make the front pulley double the size of my rear would that give me an ok set-up?
I'll try my best to get to Stirling, it would be nice to see other people's work and have some extra help on hand if needed. And yes i definately wouldn't mind meeting you too, you've been a great help Steven thank you!
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Post by Storms Racing 77 on Aug 12, 2010 16:54:46 GMT -4
Ya double your front pulley to the size of your back pulley or maybe a little smaller then double. your only dealing with a 8 hp so gearing is going to have to be fairly precise. so just go with what you think, but get the smallest you can go on your tranny, thats what makes your gears spin faster! and then play with your engine pulley. and where abouts its nepean? :S make a hard attempt to come to stirling, and if your do bring a camera, its a great chance to take pictures and see how things are set up, good way to learn for if you wanted to make a different class machine in the future. And no problem Thomas, your welcome, if you have anymore questions feel free to give a shout, but so far i've given you the basic advice for a stock mod to get into this awesome sport. the rest is basically up to you ! good luck! Steven
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