Author Topic: Been finding Killer Deals on LT250's any one doing a Big Bore Kit? (Read 2373 times)

Buckeye513 · « **Reply #25 on:** October 11, 2013, 11:17:58 am »

Depends on the power output potential and reliability.

All American · « **Reply #26 on:** October 11, 2013, 11:20:51 am »

I would as long as the new design eliminates most of the factors holding ours back from absolute domination! We should be taking over the world!

Mitch Keller · « **Reply #27 on:** October 11, 2013, 11:30:02 am »

only 98 more to go

MD2smoker · « **Reply #28 on:** October 11, 2013, 12:38:05 pm »

As for the 500's.. This is probably all conjecture anyway. Dont they start wearing out cranks and cases in a hurry when you are approaching the 90 hp mark?

Hotbutta · « **Reply #29 on:** October 11, 2013, 07:50:36 pm »

Let have a show of hands from the guys that would be willing to pay 1000.00 to 1500.00 for a cylinder and head kit for a LT 250 or a LT500.

About $600 for porting, $280 for welded ears and decking and $200 for head mods... My hand is way up!

Gas power valves please.

Dangerouspower · « **Reply #30 on:** October 12, 2013, 05:58:05 am »

I would. Would need to do payments though.

Chuckie25 · « **Reply #31 on:** October 12, 2013, 06:03:36 am »

Quote from: Dangerouspower on October 12, 2013, 05:58:05 am

I would. Would need to do payments though.

Exactly lol

All American · « **Reply #32 on:** October 12, 2013, 10:48:38 am »

#2. 86' & 88'

Dangerouspower · « **Reply #33 on:** October 12, 2013, 01:24:45 pm »

Jerry how many people/cylinders would you need to make custom 500 cylinders in the 1000-1500 range?

MotorGeek - Jerry Hall · « **Reply #34 on:** October 12, 2013, 01:31:19 pm »

Quote from: MD2smoker on October 11, 2013, 12:38:05 pm

As for the 500's.. This is probably all conjecture anyway. Dont they start wearing out cranks and cases in a hurry when you are approaching the 90 hp mark?

The ware is accelerated everywhere on an engine that was designed to be reliable at 45 Hp stock and now the power is doubled even though it was considered a high performance engine stock.

Is the ware accelerated on the crank and engine block when a knowledgeable engine builder gets his hands on a stock 400 HP Corvette engine and turns it into a 800 HP NASCAR engine?

MotorGeek - Jerry Hall · « **Reply #35 on:** October 12, 2013, 01:51:15 pm »

Quote from: Hotbutta on October 11, 2013, 07:50:36 pm

Let have a show of hands from the guys that would be willing to pay 1000.00 to 1500.00 for a cylinder and head kit for a LT 250 or a LT500.

About $600 for porting, $280 for welded ears and decking and $200 for head mods... My hand is way up! Gas power valves please.

You do not want a exhaust pressure activated power (pneumatic activated power valves) they are more inconsistent in their operation than Suzuki's mechanical method of activating the LT 250/500 exhaust valve.

If I were going to start with a clean sheet of paper, I would build a cylinder where the power valve was operated by a computer controlled stepper or servo motor. The 125cc, 250cc, and 500cc GP racing engines used the servo/stepper motor actuated power valves and was very successful for many years. The 500cc GP engines made in excess of 200 HP on gas and had a power band like a 4 stroke.

If we add this type of power valve technology to our new cylinder, now the $1000.00 to $1500.00 cylinder kit cost is around $2500.00.

MotorGeek - Jerry Hall · « **Reply #36 on:** October 12, 2013, 02:06:23 pm »

Quote from: Dangerouspower on October 12, 2013, 01:24:45 pm

Jerry how many people/cylinders would you need to make custom 500 cylinders in the 1000-1500 range?

I would have to do a cost analysis at today’s tooling and casting cost before any accurate numbers could be done. At this point I would guess 300 to 400 cylinders.

I doubt if there are 1000 to 1500 LT 500 still running in the world. Of these 1500 I doubt if 100 of the owners would spend the money to buy a new top end, pipe, carb, ignition/power valve controller and get the Quad's mechanical condition up to the point where it would take the increased power for a while.

Nopick · « **Reply #37 on:** October 12, 2013, 02:22:15 pm »

Quote from: MotorGeek on October 12, 2013, 02:06:23 pm

I doubt if there are 1000 to 1500 LT 500 still running in the world.

Wow. I would have guessed there would be more than that left. That is why I hate to see guys parting them out.

El Diablo · « **Reply #38 on:** October 12, 2013, 03:25:35 pm »

$2500 for a computer controlled powervalve cylinder for a zilla with the potential of 150+ HP? Where do I sign up?

B_Fuss · « **Reply #39 on:** October 12, 2013, 03:39:16 pm »

Brian no kidding. I could clean out some parts and make some money. To build a 150hp motor

Nopick · « **Reply #40 on:** October 12, 2013, 04:15:32 pm »

How much can the bottom end even handle?

All American · « **Reply #41 on:** October 12, 2013, 05:46:01 pm »

So far 90+ right now, right? Is there any way to hook up a device to the crank and spin it under measured loads till it breaks? Doesn't sound complicated right?

MotorGeek - Jerry Hall · « **Reply #42 on:** October 12, 2013, 07:52:53 pm »

Quote from: El Diablo on October 12, 2013, 03:25:35 pm

$2500 for a computer controlled powervalve cylinder for a zilla with the potential of 150+ HP? Where do I sign up?

You must be talking to someone that knows a lot more than anyone I know if they think they can get 150 HP from a 500 single cylinder. The 500 GP bikes are V 4 cylinder engines with electronics all over them.

El Diablo · « **Reply #43 on:** October 12, 2013, 09:10:53 pm »

Ok, so a single cylinder might not ever have the HP numbers of a multi cylinder engine, but it sure will have the torque. And torque is what motivates me.

Rainman56 · « **Reply #44 on:** October 12, 2013, 10:00:02 pm »

Quote from: Nopick on October 12, 2013, 02:22:15 pm

Quote from: MotorGeek on October 12, 2013, 02:06:23 pm
I doubt if there are 1000 to 1500 LT 500 still running in the world.

Wow. I would have guessed there would be more than that left. That is why I hate to see guys parting them out.

I would have guessed higher also but makes it that much sweeter if ya do own one.

Cunningham_821 · « **Reply #45 on:** October 12, 2013, 10:49:30 pm »

If this is the case why not just use the liger method chris seems to jave his bike runnong very well i think the motor could be built for other apps than just drag racing.

Stpltn250r · « **Reply #46 on:** October 13, 2013, 05:36:55 am »

GP Engineering has a single cylinder (sabertooth) two stroke on boost running 160hp and 90 lbs tq. Stock cases.

Stpltn250r · « **Reply #47 on:** October 13, 2013, 06:14:42 am »

OMW has ds650 bored and stroked with nitrous around 150-160hp on nitrous.

All American · « **Reply #48 on:** October 13, 2013, 09:12:47 am »

That's ridiculous. Nitro ds650! What's next, drag lawn mowers? You guys are crazy! Lol

El Diablo · « **Reply #49 on:** October 13, 2013, 09:20:25 am »

Quote from: Cunningham_821 on October 12, 2013, 10:49:30 pm

If this is the case why not just use the liger method chris seems to jave his bike runnong very well i think the motor could be built for other apps than just drag racing.

The Liger is bad a$$! But I also remember Piranha on the old site saying something about a 9 or 10 G price tag.

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Author Topic: Been finding Killer Deals on LT250's any one doing a Big Bore Kit? (Read 2373 times)

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