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Author Topic: Jetting a 250r with a 330 kit  (Read 705 times)

Offline 90zuk

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Jetting a 250r with a 330 kit
« on: December 15, 2013, 11:43:20 pm »
Hello everyone i'm new to the forum. I traded a handgun for a 90 lt250r project. The engine is suppost to be all rebuilt with a 330 kit. The carb is a flat side Minkuni, which i believe is stock. I took it apart last night and it had a 240 and .035? That's stock isn't it? I understand how to do the plug chop and what not but i was looking for some insight on what a good size of jets would be to start.

So its suppost to be a 330, it has a ltd head pipe? i think that's the brand? with an FMF Powercore pipe. That's about all i know. I'm guna try and verify that it is 330 by checking the top of the piston. so any input on tuning would be appreciated.

Also i need new front rubber brake lines if anyone has any or a good recommendation on where to buy some. Maybe steel ones? Any good recommendations for shocks? All the shocks are shot.

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Offline LT250RWV

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Re: Jetting a 250r with a 330 kit
« Reply #1 on: December 16, 2013, 01:06:43 am »
Yea the main is stock pilot 1size down. Lrd is the pipe you have. Does your motor have any engraving on it like a company  that done 330 kit. Their never was many that done them  anyways. Is their a spacer plate under the jug. You have to watch people trying to sell you more  then whats their. But lrd pipe is  a good score.
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Offline GrkGuy

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Re: Jetting a 250r with a 330 kit
« Reply #2 on: December 16, 2013, 02:49:25 am »
sounds to me like you got lied to. i hope i am wrong, but you just dont see a lt250r with a 330kit
maybe the guys new honda has the 330 kit.
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Offline 90zuk

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Re: Jetting a 250r with a 330 kit
« Reply #3 on: December 17, 2013, 04:26:18 pm »
Well i'm guna take it apart or use my friends bore scope to try and verify what piston is in it. Honestly i kinda hope that it's not a 330 cus from the little bit I've read it sounds difficult to get replacement pistons and such. I didn't get hurt either way, i only had $325 in the handgun i traded... i can part the thing out for more than that!

Thanks for the input though guys, guess i need to figure out what i got for sure before anyone can advise any further

Offline Iceracer

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Re: Jetting a 250r with a 330 kit
« Reply #4 on: December 17, 2013, 06:32:03 pm »
In order for it to be 330 it would need a 77.5-78 mm piston or be stroked if its a smaller bore.

Offline PCS

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Re: Jetting a 250r with a 330 kit
« Reply #5 on: December 17, 2013, 06:43:43 pm »
rhetorical comment but i would sort of understand to lie to someone about saying your atv has work done when it doesnt to make a sale but i hear people claim their atvs/toys have lots of work done and when it comes time to show what it can do they get scarred or get embarrassed... not trying to stereotype people but it was norm to hear people talk"big talk" and brag about what mods when i lived in VA and SC, "everyone" had big bore atvs and motorcyles, 100mph quads were "everywhere." bunch of ______ if you ask me.
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just take the head off and measure the bore with calipers
stock stroke crank would require a 77 mm bore (+10mm) to make 330cc engine
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Offline Zilla273

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Re: Jetting a 250r with a 330 kit
« Reply #6 on: December 17, 2013, 06:52:11 pm »
Its probably bore. 080 over and they added the number to 250, ive found alot of ppl think that way 2c

Offline PCS

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Re: Jetting a 250r with a 330 kit
« Reply #7 on: December 18, 2013, 01:13:15 am »
You are a guinness zilla, no sarcasm.
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Offline Zilla273

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Re: Jetting a 250r with a 330 kit
« Reply #8 on: December 18, 2013, 03:46:09 am »
Hey i try B}

Offline All American

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Re: Jetting a 250r with a 330 kit
« Reply #9 on: December 18, 2013, 11:39:39 am »
when i lived in VA and SC, "everyone" had big bore atvs and motorcyles, 100mph quads were "everywhere." bunch of ______ if you ask me.

You can tell if someone from VA is lying by wether or not their mouth is open.  I hated that hillbilly state like non other. Either full of bs or "their daddy works at the Capitol." Effing snobs. Sorry to all members from that state, but I didn't have a pleasant stay.
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Offline Dezsled

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Re: Jetting a 250r with a 330 kit
« Reply #10 on: December 18, 2013, 11:43:45 am »
We say that about the politicians here in kalifornia, you can tell they're lying if their lips are moving
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Offline Zilla273

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Re: Jetting a 250r with a 330 kit
« Reply #11 on: December 18, 2013, 08:13:03 pm »
Hey i just noticed one of my post above was #273. .....zilla273 ;D

Offline 90zuk

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Re: Jetting a 250r with a 330 kit
« Reply #12 on: December 18, 2013, 10:26:56 pm »
Wow i'm stupid. i Didn't even think about the stroke of it. So seeing the piston wouldn't tell me 100% what it is. I'll try anyway, i just haven't had time to get there after work. This is suppost to be a "kit" that's installed. there wasn't that many different ones available was there? was there kinda a standard bore and stroke to achieve 330 in these?   

Offline LT250RWV

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Re: Jetting a 250r with a 330 kit
« Reply #13 on: December 19, 2013, 12:40:10 am »
I dont think so
91 Lt250r Bartlett port and head mod v force 2 Hinson Clutch Basket Cool Head Scp Pipe and silencer ,KN air filter ,EBC clutch, Ohlins  Triple rate Shocks Redone by PEP Shocks,Stock Rear Shock Redone By Pep Shock,  DG nerf Bars , Lonestar axle 2+2,Lonestar Swingarm ,Douglas Red Label rims.

Offline Iceracer

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Re: Jetting a 250r with a 330 kit
« Reply #14 on: December 19, 2013, 09:26:11 am »
These are really hard to get to 330, most people hear 310 and they think ESR 310/330, but Hondas have a 72mm stroke. Its a common incorrect crossover.   There is/was no KIT for a Lt. They used Early tecate and Honda Sleeves, and just made them work. I've only seen 2 true 310 that I didn't personally spec and build, Ive found pistons for half a dozen others. Im telling you the old stuff are really are not a great setup, extremely thin sleeves at 74mm max bore, no one really took the time to make a real sleeve for the LT that offered a KIT, it was a off the shelf and live with it to keep them cheap. Im not saying there are no good or real ones, they are just not  from the big box stores and are FAR and FEW between.

 

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