`
OldMiniBikes.com Home Page Vintage Mini Bike Forum Vintage Mini Bike Pictures
Register Members List Calendar Search Today's Posts Mark Forums Read

Go Back   OldMiniBikes.com Forum > General > Engines and Modifications > Honda / Clone / Predator Engines

Become a Supporting Member of OldMiniBikes.com today and enjoy less advertisements, unlimited photo hosting, and many other benefits listed on this page. Supporting Memberships help pay for bandwidth costs, software upgrades and the time that goes into this site.





Reply
 
Thread Tools Display Modes
Old 10-06-2012, 05:05 PM   #11 (permalink)
 
Join Date: Sep 2009
Location: Brookville, PA
Posts: 2,463
iTrader: (14)
FYI the 420cc is 16hp.

GX390 is 13hp
rmm727 is offline   Reply With Quote
Old 10-06-2012, 06:42 PM   #12 (permalink)
Member
 
Join Date: Sep 2012
Location: Troy, Texas
Posts: 32
iTrader: (0)
Quote:
Originally Posted by rmm727 View Post
FYI the 420cc is 16hp.

GX390 is 13hp
FYI, the HF 420cc Predator is rated at 13hp.

420cc Predator
DoonerFunderburk is offline   Reply With Quote
Old 10-06-2012, 06:48 PM   #13 (permalink)
 
Join Date: Sep 2009
Location: Brookville, PA
Posts: 2,463
iTrader: (14)
Harbor Freight use to list it at 16hp. Loncin who is the manufacturer lists it at 15hp.

15 Horse power seriesú║G420F/G420FD - Loncin lndustries

Duromax blue 420cc ones are 15/16hp as well.

Harbor Freight lists it as a REPLACEMENT for 13hp engines.

Last edited by rmm727; 10-06-2012 at 06:53 PM.
rmm727 is offline   Reply With Quote
Old 10-06-2012, 10:04 PM   #14 (permalink)
Senior Member
 
paul_probus's Avatar
 
Join Date: Dec 2011
Location: VA
Posts: 361
iTrader: (1)
@RMM,

Not trying to argue, but Honda lists its 390 cc as net 11 hp.
Honda Power Equipment: Honda Generators, Lawn Mowers, Snowblowers, Tillers

@All

Not to steal the thread, but does anyone make a flywheel that can handle higher RPM's and still be able to use the Honda 20 amp charging system? I don't care about racing, I would like to build a fat tire bike around the 420 Predator, add on the Honda 20 amp charging system (cheaper to do this than buy the Honda 390 with the charging system) and get additional performance out of it. The only problem is that the couple of places I have looked at performance parts for the 420 cc engine do not have flywheels that can be used with a charging system (I guess because most people building up these engines want to race them). I'd like to be able to keep the starter, run lights and have a 12V outlet. Not looking for 10K rpm capability, but getting to 5K or 7K rpm would be about what I would be looking for.

Paul
paul_probus is offline   Reply With Quote
Old 10-06-2012, 10:27 PM   #15 (permalink)
 
vwfan79's Avatar
 
Join Date: Aug 2012
Location: fenton, MI
Posts: 1,927
iTrader: (16)
Quote:
Originally Posted by texasfabguy View Post
Sorry...

Small blocks are cheaper to build part for part but you will spend half getting over 20+HP out of a big block over the small block.
No need to apologize, I'm still new at this and welcome all the new knowledge I can get.

I do see where your coming from though as with a big block your already half way to the 20hp right out of the box.
vwfan79 is online now   Reply With Quote
Old 10-07-2012, 12:30 AM   #16 (permalink)
Senior Member
 
texasfabguy's Avatar
 
Join Date: May 2011
Location: Conroe,Texas
Posts: 2,328
iTrader: (1)
Quote:
Originally Posted by paul_probus View Post
@RMM,

Not trying to argue, but Honda lists its 390 cc as net 11 hp.
Honda Power Equipment: Honda Generators, Lawn Mowers, Snowblowers, Tillers

@All

Not to steal the thread, but does anyone make a flywheel that can handle higher RPM's and still be able to use the Honda 20 amp charging system? I don't care about racing, I would like to build a fat tire bike around the 420 Predator, add on the Honda 20 amp charging system (cheaper to do this than buy the Honda 390 with the charging system) and get additional performance out of it. The only problem is that the couple of places I have looked at performance parts for the 420 cc engine do not have flywheels that can be used with a charging system (I guess because most people building up these engines want to race them). I'd like to be able to keep the starter, run lights and have a 12V outlet. Not looking for 10K rpm capability, but getting to 5K or 7K rpm would be about what I would be looking for.

Paul
11.7 at 3600 but look at the torque it puts out at 19.5.
On your other....no one makes a billet with the charging magnets. No reason you could not add them yourself though.
texasfabguy is offline   Reply With Quote
Old 10-07-2012, 10:31 AM   #17 (permalink)
Member
 
Join Date: Sep 2012
Location: Troy, Texas
Posts: 32
iTrader: (0)
rmm727- Gotcha. Thanks for the info. I did notice that at HF the shelf tag showed the 212cc as 7hp instead of the advertised 6.5hp. And my kids have a go kart with a Subaru 169cc and it says it is 6.5hp. Doesn't seem like there is a hp standard on these little power plants.

texasfabguy- Have You seen anyone that has added the magnets to the billet flywheel? Or is there anywhere that tells how to add them? I was wondering the same thing as paul_probus.
DoonerFunderburk is offline   Reply With Quote
Old 10-07-2012, 11:11 AM   #18 (permalink)
Senior Member
 
paul_probus's Avatar
 
Join Date: Dec 2011
Location: VA
Posts: 361
iTrader: (1)
Tex,

My biggest concern with adding them myself is balance. Wouldn't that throw them out of balance? Also, being ignorant of how they're attached, would it be possible to attach them so that they stand up to the higher RPM's? I would even be OK with one of the billet flywheel suppliers attaching them for me and re-balancing the flywheel, if they're willing to do that (obviously at an additional cost). I am just not sure any of the suppliers would do that.

Paul
paul_probus is offline   Reply With Quote
Old 10-07-2012, 11:42 AM   #19 (permalink)
Junior Member
 
Join Date: Oct 2012
Location: carrabelle fl. 32322
Posts: 7
iTrader: (0)
i just got the 212 cc predator, wondering how to connect the throttle cable, im a new guy to minibikes and have been looking for 1 for a long time to use for a pit bike, thanks guys
captmullette is offline   Reply With Quote
Old 10-07-2012, 03:08 PM   #20 (permalink)
 
Join Date: Sep 2009
Location: Brookville, PA
Posts: 2,463
iTrader: (14)
Quote:
Originally Posted by paul_probus View Post
@RMM,

Not trying to argue, but Honda lists its 390 cc as net 11 hp.
Honda Power Equipment: Honda Generators, Lawn Mowers, Snowblowers, Tillers


Paul
We are both kinda right. I forgot they changed how they engines were rated. a gx390 used to be 13hp and a gx340 was 11 hp. I blame this on emissions.
rmm727 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   OldMiniBikes.com Forum > General > Engines and Modifications > Honda / Clone / Predator Engines

Tags
(420cc), 13hp, predator

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
420cc Predator budget build JimmyRigged Honda / Clone / Predator Engines 5 07-28-2012 07:17 PM
duromax 420cc sohc50 Honda / Clone / Predator Engines 2 06-14-2012 02:04 AM
Predator 420cc 20-25hp iatemeself Honda / Clone / Predator Engines 5 05-02-2012 01:00 AM
Lifan 420cc INTHE10s Honda / Clone / Predator Engines 4 12-21-2011 05:29 PM
predator 420cc how quick proturbo Honda / Clone / Predator Engines 15 08-26-2011 08:51 PM


All times are GMT -4. The time now is 05:34 PM.
Style Developed by Andrew Slane

Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2 Copyright 2006-2011 OldMiniBikes.com / OMB Group LLC
Contact Us - OldMiniBikes.com Forum - Archive - Top
no new posts