This is Part 1 of building the LCT 179cc into a 208cc "Big Bore" engine mod. We'll be upgrading the bore size from 65mm to 70mm for more power and more cc's. I bought a few of these engines at $49.95 so this should be a fun budget build! Is bigger really better? Find out in this 2 Part series!

00:00 Intro
00:24 179cc LCT Engine
00:48 208cc LCT 70mm Block
02:10 Flywheel & Coil
03:52 I Saw That
04:20 Check Fit Of Aluminum Flywheel
07:35 Carburetor
09:40 Valve Cover
11:20 Cylinder Head
12:15 Head Ports
13:18 Side Cover
14:45 Camshaft
16:15 Connecting Rod & Bolts
18:16 Wrist Pin
18:45 Crankshaft
19:19 Block Compare
21:10 Crankshaft Fitment
22:15 Outro

This LCT engine build is going to be an experiment mainly to see if the 54mm forged steel crankshaft can handle the larger 70mm bore and heavier piston without getting out of balance. This addition to the bore will increase the cc of the engine from 179cc to 208cc. I'm not certain the engine balance will handle the 70mm piston or not. If it can, we may go a bit further with the next LCT 179cc project engine.


In this video we'll disassemble a new 179cc LCT engine. Compare the 179cc block to a 208cc LCT engine block I picked up from the Bay place and we'll determine if the crankshaft and camshaft will cross over between them. Part 1 will mainly be of the disassembly and compare while we see what performance parts to use for the build.

The 179cc LCT engine uses a Honda taper flywheel, so any flywheel you have with the Honda/clone taper should fit.

I purchased a cast aluminum flywheel online for this project. These are not billet but they are spin rated and tested at 8500 RPM. That's more than I'll need for this one. I paid $39.95 for my flywheel but I ordered it along with several other items to reduce the shipping costs. I have seen them on the Bay place for $59.95. Just keep in mind the shipping fees if you decide to go this route. Of course a billet flywheel would be a better choice and they do cost a bit more. For this engine combination the 8500 RPM flywheel will be more than enough as this one will keep the stock camshaft. Also this will be a low budget build and experimental engine combination.

Rocker arms: I'm trying to locate some 1.1 , 1.2 and 1.3:1 ratio rockers for this one to experiment with different lift ratios on the intake and exhaust. There will be more details coming in Part 2.

Piston: I'm going to get a flat top piston into this build one way or another. I prefer the Wildcat 223 flat top pistons due to their reduced weight. This will hopefully help maintain the engine balance to a tolerable level. I may look at some other options as well if the piston weight is close enough.

Crankshaft specs: Rod journal : 1.179"
Flywheel taper: Honda clone type taper seems to fit perfectly. I will verify this of course once I lap the flywheel to the crankshaft and inspect the lapping marks and fit in close detail. I will update the description if anything changes and will verify exact fitment in "Part 2".

Camshaft: Since the LCT camshaft has a journal diameter of .569" we'll be using the stock camshaft in this build. I will adjust the lift and valve profile with a mix of ratio rockers. My plan is to add a 1.3:1 ratio rocker on the intake valve and a 1.1 or 1.2:1 ratio rocker on the exhaust valve.

More Info About the Connecting Rod Bolts: These LCT engines contain Grade 10.9 metric connecting rod bolts. They are manufactured using medium carbon steel, medium carbon steel alloy and low carbon boron steel that has been quenched and tempered. Used in automotive applications and for bolting large and forged parts, metric 10.9 bolts exhibit high tensile strength and good wear resistance. A grade 10.9 Bolt is a high tensile bolt. These are made up of carbon steels and low boron steels. The material is heat treated by quenched and tempered methods. The bolts are produced in a way that they have high tensile strength.

If any of you Guys watching are Kart Racers, be sure to check out
‪@franksoutdoorlife‬ Great Kart racing and coverage! Frank is also doing a tire giveaway for his Subscribers!

‪@HSPullingTeam‬ Has a new series on how to get started in Garden Tractor Pulling on a budget for those interested in Garden Tractor Pulling. His channel also features Garden Tractor and Motorcycle engine powered Hot Rod Pulls!

‪@peterchristlieb‬ Has a new 236cc build going on with the MoFlow billet head!

‪@dirty7739‬ Has a 236cc build going with a DED billet head!

Where can you find the LCT 179cc $49.95 engine?
These are available at Surplus Center in Lincoln Nebraska. They have a website at:
https://www.surpluscenter.com/

Surplus Center also has a store at the Bay place named "burdensales". The shipping is a couple of bucks cheaper.

I'm not sponsored or affiliated with Surplus Center in any way.

You can also find some videos on the LCT 179cc engine from the guys at ‪@azlongtales‬



#budgetbuild
#enginebuild
#lct