What are the downsides of having a big bore kit?
What are the downsides of having a big bore kit?
With a speed kit, you're more likely to seize your engine. You go through clutches pretty fast if you tune them right. You need a performance pipe and a larger carb. I say you might as well port your stock cylinder to see if you like moped speed. Going 50+ mph on a moped is kinda scary.
your insurance can also be void if you wreck
Coco Salazar is such a ballin name.
You absolutely have to become an entertainer of some sort. You can't waste a good famous person name, by being normal.
more expensive, more tuning, more equipment required.
Say you drop $120 on a bore kit. Well, is your engine in decent shape? can your bike support it? Youre just wasting power and making your bike prone to failure if youre ped is in shit shape. Now you gotta rebuild your engine, new chains, wheel bearings, etc, thats as much as i dunno $100 and some time. Youre not gonna run that dinky 12mm carb on it, are you? 15mm carb is around $80. And that shitty stock pipe? Performance pipe is around $70 for like a biturbo, up to $200 for something like a G3. So thats a ballpark of.... $400 maybe? Granted, thats just the way id do it. You can just slap on a kit if you want but i really dont think itd be worth it.
Then on top of that, youre gonna need to know how to install it and tune it all, which is another obstacle, _and_ you need to know how to maintain it, which isnt the same as maintaining a stock ped.
a lot depends on youre bike though, kitting a maxi is cheaper than kitting a motobecane (tell me about it).
dont let me discourage you, though. throw a kit on that bitch.
id rather just have a ported stock bore with a pipe and bigger carb/intake
its still as reliable as stock and a not easier to get parts for if it breaks
but then again i ride a minarelli where it cost $1500 in hipo parts where as a puch you can do the same for about $400 and the kits are a lot more reliable
Haha, I have no concern about port matching or anything, and that for me is easily done. I just wanted to know the downsides, because i want a fast ped. I live in a small town in NJ, and going fast is a thing that is just a way for me to show off what i have done, but i will never use it at WOT most of the time.
if u ride a tomos, which it sounds like u do, ten hell throw a kit on re-jet and forget!
if u ride something vintage, stick with stock until u don't need a web forum to answer this question.
There are too many variables and hella downsides to kitting bikes to just list em without it sounding like an all together really bad idea.
I can't even ride a stock bike anymore it hurts. well maybe a solex as long as i don't have to ware a helmet
nobody's mentioned gas mileage, which isn't a really big deal but i guess it's something to consider. when my puch was stock, it easily got 75+ mpg, now it's more like 50. oh well.
also, since you basically have to put a performance pipe on to tune a kit right (or else, why bother?), the bike gets a lot louder.
Any thoughts on best trade-off between mpg and performance?
i mean, i almost don't know why i mentioned it, since 50 miles to the gallon is still better than, say, toyota hybrids make, on average. so it's not much of a tradeoff. but if you wanted to think about it that way, the answer is that anything you do to your bike that requires you to upjet is going to make the bike less fuel efficient. also, anything that makes the bike rev higher at the same speed is going to make the bike less fuel efficient, and most things that you do to improve air flow will make the bike less fuel efficient.
let's say, though, that you commute to work ten miles a day. if you kit your e50, you go from about a twenty-five minute commute to a fifteen minute commute, depending on how many stop lights you hit etc. and, it costs you, say,
Yea, i have an a55 with and i ordered an airsal, tecno next exhaust, and a bigger front sprocket, and a bigger jet so it doesnt run lean, and I hear that the A55's do ok with kits. I have a stock 1976 maxi S and its the 1 speed, so the engine is so simple, but I dont know the internals of the tomos that well, so replacing clutched would be kinda hard for me, at least for the first time.
What's involved in porting?
Well, all it is is opening up the two gas ports so when you get a bigger kit with bigger ports, the gas flows easily and smoothly without any interfeirance. You also get what you payed for in the big bore kits. You would need a dremel tool or a similar tool that runs at high RPM with a good bit.
How could you say that a kit will cost you an additional $14 in gas a DAY?!
Thats an additional 4 gallons of gas (at $3.30UDS) for a 15 minuet trip. There is no way your analogy is anywhere near correct.
Yes, kitting will use up more fuel but unless your going to throw an 80cc kit on your puch, it will still get better gas mileage them any car on the streets.
But if you need versatility, that car will be a godsend.
Downside or not, I'm throwing a kit, a Technigas Next, and a bigger carb/intake/filter on my 2007 A55 to safely keep up with traffic in Chicago.
i said cents, but i used the symbol for it (option-4) and i guess that doesn't render on this forum
Coco Salazar, wasn't he in ScarFace?
That's what I thought, but are there any specific guidelines? I'm thinking, making the ports wider would give more airflow and not affect anything else, but enlarging the top of the port would cause the port to open sooner, which might cause a less optimum exhaust / fuel charge sequence than the intended design of the engine. And I'd think the bottom of the port would go all the way down to where the piston is at bottom dead center, so making the bottom of the opening lower won't have any effect. How much do you normally grind out?
widening helps midrange the most, and can give you a nice smooth pull on a low-mid pipe, but it does make you idle rough and it burns out your rings faster because they have more area exposed to hot gasses for a longer period of time, but most people on here dont ride enough to have to think about that.
raising exhaust makes you idle rough and craps on your low end... you'll have to tune your clutch to grab higher if you want a good pull off the line, but you'll rev out and your pipe will be more of an atomic slingshot than just a slight pull.
you never want to lower your ports below stock, unless you are getting really tricky and changing the deck hight/stroke. the rings need to be in contact with metal for the brief second it pauses at the bottom of stroke, or you'll annihilate them.
"but most people on here don't ride enough to have to think about that. "
I bet only 1% ppl on here have a moped as their primary form of transportation, with only a bicycle as back up. 90% of that 1% live in SF!!!!
throw a kit on that bitch
call me part of that 1% elliot...
Puch Nostalgia, Bianchi Bianchimatic, and a Motobecane Record road bike to back those up.
my car cost less than my moms tomos.
Im daily commuter, I go about 10 miles, several of which are in a 45 zone. For you guys that commute regularly, do you use the faster roads that clearly shouldn't accomidate mopeds, and If you do, do you guys get pulled over for this? I haven't been pulled over, but am I just pushing it by casually riding 45? I guess Im asking if this is a bad idea and if I aughta stick in the bike lane...
maybe this is the wrong forum...
Go as fast as you can and pretend you're a motorcycle. Lane split, roll thru stop signs, have fun but don't be an asshole. That's what I do everyday and I never get pulled over.
bret is right
Nice! thats good to hear. I can have more fun riding if im not paranoid about that kind of thing, thanks.
its easy to ride daily in san fran.. but its not really easy to ride daily anywhere.
its really crazy when you actually think about fuel economy and parts life of your moped. I plan my builds with when i'll have a new daily driver ready, and keep them in rotation, so i burn up one engine when i have time to rebuild it, etc.
fuck a bus.
yeah u need at least 2 bikes to ride everyday w/o fail, eventually one will break down
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