cg250cc mini trike turbo

Nandor · 10-09-2018, 06:19 AM

Hi all after a bit of advice im wanting to get as much power as i can out of a zonshen 250cc have been thinking i mightdo a drawthrough carby turbo.
I have just finished cleaning up the motor to replace the tired 200cc lifan i have in it but really want to get the most out the cg250
So any advice to squeeze some extra power would b great

kirbo7106 · 10-09-2018, 09:20 AM

Welcome to the forum! Nice trike! Way to start with pictures! Is it me or is that like an adult version of a Big Wheel?!? Ok, adult is probably not the correct word to use. Calling most of us “adults” is...well...yeah, you get the idea!

Ok, back to the “older” person Big Wheel! That is so awesome! I know we usually ask for pictures, but this deserves a YouTube video!!!

I can’t really help you with the turbo, but I’m sure some of the other members can.

Enjoy the Ride!

Bruces · 10-09-2018, 09:36 AM

That looks like a lot of fun .

Nandor · 10-09-2018, 02:44 PM

Thanks guys been a labour of love building this over the past 3-4 years, adding bits and improving what i can.

Ill try find a video for u so u get to see how small it really is but still gets up and moves, have got 83km/h out of it on dirt in third but ran out of space to wind it up any more

roundhouse · 10-09-2018, 04:02 PM

looks cool! there is a turbo thread in the dual sport section but i do not think anyone has tried it. if you figure it out let us know.

Nandor · 10-09-2018, 06:42 PM

So far im planning on getting a tunable cdi so i can avance the timing if need be
will b running a 34mm makuni carb with adjustable needle and set the jets
Will also b running a air/fuel gauge with warning light to ensure i dont run it to lean
i will have a separate oil tank with pump and oil cooler so i dont risk starving the motor of oil and ill run the pump on a timer like a turbo timer so it continues to pump oil round after the motor is stopped to cool down the turbo and get excess temp out
Will start off at low psi round 4psi and wind up from there
All this together and a propper dyno tune before i ride it should hopefully keep it from blowing up fingers crossed!!!

ben2go · 10-10-2018, 10:43 AM

The crankshaft is pressed together from my understanding. If that is true, you won't get much pressure in the engine before the crankshaft separates. I've seen quite a few failed pistons in these engines that are run in the Bobber. That would be the next weak link.

Weldangrind · 10-10-2018, 12:19 PM

Honestly, that first picture made the hair on my arms stand up.
It looks like a jockey shift and a hand clutch; is that right?

david3921 · 10-10-2018, 02:13 PM

Why is the front brake caliper on the opposite side?

Nandor · 10-10-2018, 02:44 PM

Quote:

Originally Posted by Weldangrind

Honestly, that first picture made the hair on my arms stand up.
It looks like a jockey shift and a hand clutch; is that right?

Yeah its a suicide shift clutch to take off just slam gears lol

Nandor · 10-10-2018, 02:45 PM

Quote:

Originally Posted by ben2go

The crankshaft is pressed together from my understanding. If that is true, you won't get much pressure in the engine before the crankshaft separates. I've seen quite a few failed pistons in these engines that are run in the Bobber. That would be the next weak link.

Thank u for that ill look into it further

Nandor · 10-10-2018, 02:48 PM

Quote:

Originally Posted by david3921

Why is the front brake caliper on the opposite side?

Gd spoting, was wondering if anyone would pick that up lol
im changing the bottom mounts on the shocks and just sat it together to get it mobile. bloody things have corroded themselves on there rather well

Weldangrind · 10-12-2018, 10:47 AM

Quote:

Originally Posted by Nandor

Yeah its a suicide shift clutch to take off just slam gears lol

Do you plan to engineer a foot clutch?

Nandor · 01-12-2019, 07:09 AM

Nah not at all if i was going to chsnge vfb the clutchni would put it on the suicide shifter

bogieboy · 01-12-2019, 12:00 PM

looks like a very fun project... i built this about 6 yrs ago now.... was a hoot to ride.... had an old honda 75cc engine in it....

10-09-2018, 09:20 AM	#2
kirbo7106 Join Date: Feb 2017 Location: Holiday, Florida Posts: 672	Greetings! Welcome to the forum! Nice trike! Way to start with pictures! Is it me or is that like an adult version of a Big Wheel?!? Ok, adult is probably not the correct word to use. Calling most of us “adults” is...well...yeah, you get the idea! Ok, back to the “older” person Big Wheel! That is so awesome! I know we usually ask for pictures, but this deserves a YouTube video!!! I can’t really help you with the turbo, but I’m sure some of the other members can. Enjoy the Ride! __________________ Dan-O -2018 Tao Tao HellCat - DOA -2016 Hawk 250 - Kitty Hawk - eBay exhaust, Mikuni carb(120 main/30 Pilot), airbox mod with K&N filter, digital cluster, total LEDs, 17/45 sprockets, RK chain, Shinko 244 tires, trunk, aftermarket levers, burrito tube, skid plate, Sargent Cycle Seat... -2003 HD Sportster 100th Anniversary -1999 Buell X-1 Lightning - Race kit, Buell Seat
	2

10-10-2018, 12:19 PM	#8
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Honestly, that first picture made the hair on my arms stand up. It looks like a jockey shift and a hand clutch; is that right? __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	1

10-10-2018, 02:13 PM	#9
david3921 Join Date: Feb 2009 Location: Michigan Posts: 1,030	Why is the front brake caliper on the opposite side? __________________ 2012 Kawasaki Versys 1984 Honda Magna V65 2016 Rhino 250 2016 Tao Tao 125D
	0

10-09-2018, 09:36 AM	#3
Bruces Join Date: May 2018 Posts: 1,572	That looks like a lot of fun .
	1

10-09-2018, 02:44 PM	#4
Nandor Join Date: Oct 2018 Posts: 47	Thanks guys been a labour of love building this over the past 3-4 years, adding bits and improving what i can. Ill try find a video for u so u get to see how small it really is but still gets up and moves, have got 83km/h out of it on dirt in third but ran out of space to wind it up any more
	1

10-09-2018, 04:02 PM	#5
roundhouse Join Date: Sep 2017 Location: N Texas Posts: 706	looks cool! there is a turbo thread in the dual sport section but i do not think anyone has tried it. if you figure it out let us know.
	1

10-09-2018, 06:42 PM	#6
Nandor Join Date: Oct 2018 Posts: 47	So far im planning on getting a tunable cdi so i can avance the timing if need be will b running a 34mm makuni carb with adjustable needle and set the jets Will also b running a air/fuel gauge with warning light to ensure i dont run it to lean i will have a separate oil tank with pump and oil cooler so i dont risk starving the motor of oil and ill run the pump on a timer like a turbo timer so it continues to pump oil round after the motor is stopped to cool down the turbo and get excess temp out Will start off at low psi round 4psi and wind up from there All this together and a propper dyno tune before i ride it should hopefully keep it from blowing up fingers crossed!!!
	2

10-10-2018, 10:43 AM	#7
ben2go Join Date: Jun 2011 Posts: 1,335	The crankshaft is pressed together from my understanding. If that is true, you won't get much pressure in the engine before the crankshaft separates. I've seen quite a few failed pistons in these engines that are run in the Bobber. That would be the next weak link.
	1

01-12-2019, 07:09 AM	#14
Nandor Join Date: Oct 2018 Posts: 47	Nah not at all if i was going to chsnge vfb the clutchni would put it on the suicide shifter
	0

01-12-2019, 12:00 PM	#15
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,042	looks like a very fun project... i built this about 6 yrs ago now.... was a hoot to ride.... had an old honda 75cc engine in it....
	1