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Forum: Did not Finish Logs 12-24-2017, 06:01 PM
Replies: 22
Views: 4,683
Posted By Blackdog
Good stuff. Im going to keep my eye out for a 250...

Good stuff. Im going to keep my eye out for a 250 four stroke bike engine.

---------- Post added at 08:01 PM ---------- Previous post was at 07:58 PM ----------

What's the displacement in this...
Forum: Using Tools and Welding 12-20-2017, 08:14 AM
Replies: 32
Views: 4,014
Posted By Blackdog
Thanks. I was looking at step bits and the...

Thanks. I was looking at step bits and the graduations seem to be about 1/8"...so not good for 3/16" stock. I guess I'll just buy 1/2", 5/8", 3/4", 1" twist drill bits.
Forum: Photo Gallery & Project Log 12-20-2017, 08:09 AM
Replies: 7
Views: 1,281
Posted By Blackdog
Have C25 gas all set up. Part should be here...

Have C25 gas all set up. Part should be here soon and we'll be cutting and welding this weekend.
Forum: Engines & Clutches 12-17-2017, 07:03 PM
Replies: 24
Views: 4,817
Posted By Blackdog
Jeez...i never knew that. So you'd need to reuse...

Jeez...i never knew that. So you'd need to reuse the bike exhaust/muffler or have a custom one made...hmmmm....there are not off-the-shelf pipes for this motor?

---------- Post added at 09:03 PM...
Forum: Photo Gallery & Project Log 12-17-2017, 06:52 PM
Replies: 7
Views: 1,281
Posted By Blackdog
Got welder rigged up... somehow missing the gas...

Got welder rigged up... somehow missing the gas dispersion thing in the gun nozzle...so....no welding today. Got a little propane Mr Heater set up in garage. 15 degrees outside and Mr Heater only...
Forum: Photo Gallery & Project Log 12-17-2017, 06:50 PM
Replies: 7
Views: 1,281
Posted By Blackdog
Photos

Photos
Forum: Photo Gallery & Project Log 12-17-2017, 06:45 PM
Replies: 7
Views: 1,281
Posted By Blackdog
Photos

Photos
Forum: Photo Gallery & Project Log 12-17-2017, 06:42 PM
Replies: 7
Views: 1,281
Posted By Blackdog
Browsing to a folder on my phone.

Browsing to a folder on my phone.
Forum: Go Kart Discussion 12-17-2017, 06:37 PM
Replies: 6
Views: 557
Posted By Blackdog
Slightly rusted flywheel magnets/bad coil gap?...

Slightly rusted flywheel magnets/bad coil gap? (Thus your weak spark) It should be fat and blue.

Also, is it real easy to pull starter cord? (Poor compression)>>>bad valves or bad head gasket?
Forum: Photo Gallery & Project Log 12-16-2017, 07:08 PM
Replies: 7
Views: 1,281
Posted By Blackdog
Blackdog & Son KartFab Build

All tooled up: New Lincoln 180 MIG welder, torch, tools, etc. Made 4x8 fabrication table. Picked up steel two days ago. Will start doing some practice welds tomorrow since its been quite a few...
Forum: Engines & Clutches 12-16-2017, 06:40 PM
Replies: 24
Views: 4,817
Posted By Blackdog
Assuming i could find a CR125 or a CR250 engine...

Assuming i could find a CR125 or a CR250 engine used, for reasonable money ($500 or less)...which would be a better option for some fast fun...not looking for race class compliance. Is the 125 too...
Forum: Engines & Clutches 12-16-2017, 10:53 AM
Replies: 24
Views: 4,817
Posted By Blackdog
This world of shifters is pretty confusing for...

This world of shifters is pretty confusing for the neophyte. So here's a guy with a decent racing shifter, a 125cc two-stroke, and his kart appears well set-up. Apparently this is a 125 from a...
Forum: Engines & Clutches 12-16-2017, 09:32 AM
Replies: 24
Views: 4,817
Posted By Blackdog
Hmmm...I'm not sure what that means. The title...

Hmmm...I'm not sure what that means. The title says "4 stroke vs. 2 stroke"...but the clip doesn't explain anything about the difference or explain what the guy is running on that kart.
Forum: Engines & Clutches 12-15-2017, 09:44 AM
Replies: 24
Views: 4,817
Posted By Blackdog
Is a 150-200cc 4-stroke dirt bike motor and...

Is a 150-200cc 4-stroke dirt bike motor and transmission going to move a 200 pound rider on an older racing frame....like 70-80 mph top end?

Whats the top end of a Lifan 125 on an older racing...
Forum: Using Tools and Welding 12-15-2017, 09:34 AM
Replies: 32
Views: 4,014
Posted By Blackdog
That's a nice looking frame. I'm going to check...

That's a nice looking frame. I'm going to check that out later.

---------- Post added at 11:34 AM ---------- Previous post was at 11:32 AM ----------

I have a bunch of Lenox and Milwaukee...
Forum: Engines & Clutches 12-14-2017, 06:00 PM
Replies: 24
Views: 4,817
Posted By Blackdog
What would be good dirt bike engines to consider?...

What would be good dirt bike engines to consider?
Four stroke/air cooled?
Forum: Photo Gallery & Project Log 12-13-2017, 06:09 PM
Replies: 37
Views: 21,212
Posted By Blackdog
KF, Just saw this. Nice! PS...LOVE SketchUp!...

KF, Just saw this. Nice!
PS...LOVE SketchUp! Awesome free program is so easy to learn. MUCH better than any kind of CAD/AutoCAD for this sort of stuff because as designer you are constantly in 3D...
Forum: Using Tools and Welding 12-13-2017, 05:24 PM
Replies: 32
Views: 4,014
Posted By Blackdog
Probably 3/16 or so....i can see that the step...

Probably 3/16 or so....i can see that the step bit is going to be less functional as the material gets thicker
Forum: Engines & Clutches 12-13-2017, 05:13 PM
Replies: 24
Views: 4,817
Posted By Blackdog
Thanks man...that was really exactly what I was...

Thanks man...that was really exactly what I was looking for. Understand a lot better.
Forum: Engines & Clutches 12-13-2017, 04:01 PM
Replies: 24
Views: 4,817
Posted By Blackdog
Wrong word maybe? What I really dont understand...

Wrong word maybe? What I really dont understand is:
On the pro racing machines...are they actually clutching when shifting? because I cant' see it if they are. those transmissionsare designed to...
Forum: Engines & Clutches 12-13-2017, 02:40 PM
Replies: 24
Views: 4,817
Posted By Blackdog
Thanks...I'm doing a kart now with a 212...

Thanks...I'm doing a kart now with a 212 Predator, but thinking ahead to a shifter kart.
Do these 125 or 150 Lifan transmissions do OK long-term (non-racing)? Can you slam-shift them without...
Forum: Using Tools and Welding 12-13-2017, 02:37 PM
Replies: 32
Views: 4,014
Posted By Blackdog
Like a diamond-dust bit?

Like a diamond-dust bit?
Forum: Using Tools and Welding 12-13-2017, 12:39 PM
Replies: 32
Views: 4,014
Posted By Blackdog
How to drill holes in mild steel: 1/2" up to 1 1/4" or so?

My standard twist drill bits go up to 3/8" I could buy a 7/16" if I needed it. What about drilling larger holes? How is that accomplished ?(presently I do not have a plasma cutter or a drill press)
Forum: Engines & Clutches 12-13-2017, 12:28 PM
Replies: 24
Views: 4,817
Posted By Blackdog
So 6.5 KW @ 7500 RMP only makes 8.7 HP? Is the...

So 6.5 KW @ 7500 RMP only makes 8.7 HP?
Is the 125 Lifan on a light frame fast?
What kind of HP are the pro racing motors making?
Forum: Engines & Clutches 12-13-2017, 11:51 AM
Replies: 24
Views: 4,817
Posted By Blackdog
Thanks. I don't see answers on that page...maybe...

Thanks. I don't see answers on that page...maybe I'm missing something.

That Lifan 125...roughly what sort of horsepower is that making stock? I don't really understand KW @ RMSs ratings.
Does...
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