Yes more Metra65 questions..sorry

Metra65 on an e50 with a delorto 14/12 yea tiny i know, i just need something to get the bike running so i can make shure all my fab work was worth it to make the motor and the bike be buddies (sebring with an e50) i'll def go bigger soon but i just need to have the bike running so i can finish up the exhaust and fitment issues. Soooo will that 14/12 be safe just for a few test runs or is it badnew bears for my new kit. Tanks Mark

Re: Yes more Metra65 questions..sorry

tiny carb will just make your engine/kit last longer, since you won't be revving it up to insane rpms. it's the jetting of the carb that'll kill you if you run it too lean for any length of time.

Re: Yes more Metra65 questions..sorry

Tanks dude big ups.

Re: Yes more Metra65 questions..sorry

my friend ran a 14 12.. for the first 150 miles.. with like a 68 jet or something huge like that..

now he runs a 15.15..

Re: Yes more Metra65 questions..sorry

did he have any issues at all with the fist set up or was that just is breakin setup?

Re: Yes more Metra65 questions..sorry

Don't break it in with a 14.12! It'll never hit high RPMs, and then when you DO put a bigger carb on, and DO hit higher RPMs, the rings won't seat properly. At least, that's what a year or so of reading these forums has taught me.

Re: Yes more Metra65 questions..sorry

hmmm well thats a bummer anyone els agree not that i dont belive you its just that i got two that say aok and you that says noway...

Re: Yes more Metra65 questions..sorry

i think you're going to hit a bit of a philosophical wall here. what he's saying is, with a small carburetor, you can't break in your kit properly because you can't hit high rpms. so he's clearly a "hard break in" person: someone who thinks that to get the rings to seat properly/the cylinder honed, you have to do some HARD riding during break in. virtually all experienced two stroke tuners i've read say the same thing. on the other hand, it's very easy to over-do the hard break in routine . . . in which case you end up seizing your kit, which is a lot worse, obviously, than not breaking in quite as well. for that reason, cautious types often opt for the soft break in procedure, where you don't do any hard riding for the first couple hundred miles of the kit's life, that way insuring that you don't fuck it up. after a couple hundred miles, the cylinder walls have been honed down well enough/had enough oil worked into them that you can start riding harder, though they're not broken in perfectly, like they would have been if you'd done a hard break in.

so one way to look at it is, your 12mm carburetor is an insurance policy against you fucking your kit up by revving too high for too long during break in, since with such a small carb, you can't. after 200 miles, maybe you'll have saved up enough for that new, bigger carb, which you can then run with glorious abandon, without any fear of seizure (assuming you jet it properly). the other way to look at it is, you can't possibly break in your kit speed racer-level perfectly without a bigger carb to allow you to rev higher. but a lot, a lot of people seize their kits during break in, so the cautious line of reasoning is worth consideration, i think.

sorry to write such an essay!!

Re: Yes more Metra65 questions..sorry

I put a 20mm on xWest end Brianx's and jetted it a bit rich inorder to limit his revs and I told him to ride the shit outta it, it's been fine so far, he just has to change the plug about once a week, now it has been about a monts and so we are gonna downjet and let'er rip! woo, I think that's the proper way to breakit in. I could be way off though

Re: Yes more Metra65 questions..sorry

hey mark, I've got a 15 bing if you wanna try that instead, it just needs a new float, but we can get that from justin anyday

Re: Yes more Metra65 questions..sorry

i agree that that's the best way, i'm just saying, it's harder to mess up your kit with a 12, so it's the safer way.

Re: Yes more Metra65 questions..sorry

btw, what was that rich jet on the 20mm? i'm going to break in my new kit with a 19mm carb, i was thinking somewhere around 100 was probably right . . . does that sound too high/low?

Re: Yes more Metra65 questions..sorry

it actualy was a 19.5 and it was a 104, although Brett was building the same motor with a 20 and he runs right in the 70s so I suggest you start with the highest one and then downjet 'till you stop four stoking, then go back up one. with the needle in one of the middle spots and the pilot screw 2 full spins out, then once you have your mainjet start to screw with what your midrange feels like.

Make sure you warm up your bike before you test

Re: Yes more Metra65 questions..sorry

thanks dude. i have a 75, an 88 and a 95 . . . the 95's in the old/messed up kit now, and it feels lean, so i ordered a range between 90 and 110 to dial in the new one. i know jetting's very specific bike to bike, but it's great to have a reference point, so thanks a lot

Re: Yes more Metra65 questions..sorry

you have a bike your itching to test. The 14/12 will work without damaging the engine as long as it's jetted correctly. you may decide it's fast enough for you, in which case you can run it like that forever. You may decide it's too slow, in which case you can put the 15 on. In any case, you can do your testing/fitting with the 14/12 and get some satisfaction at hearing the motor run while you wait for the 15. Break your engine in with the carb you plan to run.

Re: Yes more Metra65 questions..sorry

Thanks Hippy i'll take u up an that if your gonna be around this weekend, Just give me a buzz 8042528911 do it!!!

Mark

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