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1  For Sale / Mower Engines & Parts / Re: Gxv390 welded head on: December 31, 2014, 12:33:06 PM
Sold  please lock
2  For Sale / Mower Engines & Parts / Gxv390 welded head on: December 29, 2014, 08:17:14 PM
seeing if there is any interest in my gvx 390 welded head. comes complete with large stainlessvalves,  brass guides,comp cams .600 lift springs,rev 1.3 roller rockers over $700 in head alone plus roller rockers.these are still on my mowchine i will pull off and measure valves i dont remember sizes off top of my head . combustion chamber has been welded and has heart shape combustion chamber i will email pics on request. roughly 24cc. only .005 off head to true surface   $700 obo.  thinking about different route only reason im selling. this head will raise compression 2 full points and flows very well
3  General / Newcomers / Re: uslmra rookie in illinois on: August 22, 2014, 02:37:45 PM
our next race is sept 13@5pm. check out out facebookpage@ applerivermowtorspeedway to see pics and our schedule.
4  General / Newcomers / Re: uslmra rookie in illinois on: August 20, 2014, 12:36:03 PM
come on over to apple river this weekend august 23. we are having a race@ 6pm. our gp class has usually 8-10 tractors in it and you can get a good look@ some of the builds. we are located@ 301 west hickory street. about an hour from you.
5  Engine Help / Honda and Clone Engines / Re: Gxv 390 flywheel on: February 25, 2014, 06:18:25 AM
i did say that wrong..the gxv taper is smaller...cuz when you put flywheel on engine it hit the block before it gets tight on the taper. there maybe a diffrence in model years tapers i would get ur mic out and measure beginining of and end of taper and the width of taper and call arc. im just trying to save you what i went thru... i ended up buying two jr dragster 5hp flywheels off of ebay and robbing flywheel magnets to make new wheels. yes.... im that dumb cuz i also run a gxv620 in the bp class
6  Engine Help / Honda and Clone Engines / Re: Gxv 390 flywheel on: February 24, 2014, 07:34:41 PM
i bought a gx390 flywheel for a 2005 gxv390 3yrs ago and let me assure you, that did not fit my engine, the crank tapers are different. the gxvs have a larger taper than the gx so u cant even rebore hub. i ended up having a flywheel made.
7  Engine Help / Honda and Clone Engines / Re: Honda & Clone Cranks on: September 16, 2013, 12:45:21 PM
cranks wont interchange. rods are the same length,but horizontal has dipper on it,vertical does not.vertical has two balance shafts,horiz. has one,vertical has oil pump drive on camshaft,horz.doesnt have oil pump.crank shaft tapers are diffrent between horz.and vertical also
8  Engine Help / Honda and Clone Engines / Re: Interchangeable?? on: October 20, 2012, 05:44:00 PM
depends on which 620 you have. the early blocks had 5 bolt cylinder heads and the later blocks used 4 bolt  and will interchange with the 670.
9  Engine Help / Honda and Clone Engines / Re: gxv390 balanceshafts? on: May 23, 2012, 10:12:18 PM
thanks guys! sorry wasnt meaning to sound like i had an attitude cuz i dont . i figured more people ran these an was a little frustrated @ no responses. again i apologize. think ill leave shafts in n see what happens. i had my billet fly wheel neutral balanced and will try that. might b good or i may have a expensive paint shaker! lol thanks again
10  Engine Help / Honda and Clone Engines / Re: gxv390 balanceshafts? on: May 18, 2012, 01:39:12 AM
apparently cuz im a newb no one will reply to my question. chuck you probably no that the gx& the gxv are diffrent critters. gx has one shaft& gxv has two. weight of shafts are twice that in gxv than the gx. so again i ask pitch them or leave them?
11  Engine Help / Honda and Clone Engines / gxv390 balanceshafts? on: May 01, 2012, 11:06:26 PM
 unlike the gx390 the gxv has two balance shafts. pitch them or leave them? this engine will run 7000. and what do u recomend for balance%
12  Engine Help / Honda and Clone Engines / Re: Gxv340 parts swap on: June 09, 2011, 05:43:48 PM
i had one made .keep pestering arc maybe they will see the interest in this engine and build one.they told me there wasnt enough interest in them a year ago for them to design one.
13  Engine Help / Honda and Clone Engines / Re: Gxv340 parts swap on: June 06, 2011, 08:06:48 PM
yes the 340 can be bored 2 fit 390 piston. and no the gx 390 billet fly wheel will not fit the v series engines as the crank taper on a gxv is smaller than the taper on the gx series.  build that engine. they are a torque monster is done correct.
14  Engine Help / Other Engines / Re: gxv390 billet flywheel on: September 16, 2010, 10:44:49 PM
k guys,havin 1 made ,wonderin if any body else was interested,have 3d cad drawing and going to machine shop mon.Talked to tom@arc on tuesday,and not enough interest in this motor to make one and it will cost $3000 for the first one but $250 after that.i cant afford the first one but if anybody else can please step up now and id love to help u out!i will keep every one posted on results and price because i will make this happen at a fair price
15  Engine Help / Other Engines / Re: gxv390 billet flywheel on: September 15, 2010, 04:03:13 PM
gxv hub is smaller id than gx.smallend of crankshast measures.900 large end of taper measures 1.150 i know they are metric but are there any other engines with similiar measurements that i could machine? all i run r hondas so i dont have any other engines lying around.
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