Muncie Posted November 21, 2019 Share Posted November 21, 2019 I snaffled this off Trademe after watching it for ages it needs a cam which is no major so I'll order one off ebay and see how it runs. Been later model then my GX610 on the scooter it has CDI ignition bigger charge coil and is 688cc. Dont know what ill do with it........ Specs as below : Honda GX690RHTXF7 Horizontal Shaft V-Twin Engine Features GX690 with 1 1/8 Inch crankshaft TYPE Air cooled 4-stroke OHV petrol engine, 90° V-twin design, horizontal shaft BORE & STROKE2 / 78 x 72 mm DISPLACEMENT 688 cm3 COMPRESSION RATIO9.3:1 NET POWER 16.5 kW (22.1 HP) / 3 600 rpm CONTINUOUS RATED POWER11.5 kW (15.4 HP) / 3 000 rpm 13.0 kW (17.4 HP) / 3 600 rpm MAXIMUM NET TORQUE 48.3 Nm / 4.93 kgfm / 2 500 rpm IGNITION SYSTEM Digital CDI with variable ignition timing STARTING SYSTEM Electric starter FUEL CONSUMPTION AT RATED POWER 6.7 L/hr - 3 600 rpm LUBRICATION SYSTEM Full-pressure OIL CAPACITY 1.9ltr DIMENSIONS 429 x 410 x 438 mm (T-Type) DRY WEIGHT 44.6kg 4 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 21, 2019 Author Share Posted November 21, 2019 Think this might end up with the Mikuni's on it.... i have a mountain of cool stuff ive stock piled for the other engine but have sidestepped for whatever reason. Could repower a Prius maybe. A cross kart is the dream machine and i have an uncle who races a polaris with spares i could potentially burgle. 1 Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 22, 2019 Share Posted November 22, 2019 cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart, cross kart!!!!! 2 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 22, 2019 Author Share Posted November 22, 2019 I've got it back from Auckland today from a Stihl shop mechanic who was quite switched on and had an equally cool engine project. Everything thing is there quite frankly i could make it run on the existing cam. Its the governor that failed (like it'll need that!!) The fibre gear on the cam is a bit worn but would work fine. Hmmm stand by im going to degrease it and make sure its complete. 1 Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 22, 2019 Share Posted November 22, 2019 Cross kart? Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 After a good jet wash with some degreaser. 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 Seems all there. 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 I knew this when i bought it this runs a 1 1/8 crank so clutches drives etc are either bloody moonbeams or industrial spec and wont take more than 3000rpm. 1" is the standard off the shelf size i can either machine down the crank so im back in to 1" parts. I would like gearbox though..... any ideas? Rumour has it these punch out 25-28 hp peak so i may even have to run 2 centrifugal clutches to get the power out. Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 23, 2019 Share Posted November 23, 2019 Could go to a Jack shaft with a 1" clutch mounted on that. Chain driven between motor and jack shaft at any given ratio for your required purpose (cross kart...cough...cough...). 5 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 Im thinking hard about some sort of belt drive as a chain spinning constantly would chatter quite a lot. A Jack shaft would be the easiest fix. Its good having a look inside one of these engines as ive not cracked the other open yet probably should as the governor is still in there and has seen 2000rpm over what it trys to control..... might explain why it sounds like it has gilmer drives. Going to bang the cam in tomorrow fresh oil and see what it does. Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 5 hours ago, Kimjon said: Cross kart? I may be able to get this.....it is a kart. https://www.dropbox.com/s/bwltxve94sdzg4w/received_784497652008254.mp4?dl=0 1 Quote Link to comment Share on other sites More sharing options...
Kimjon Posted November 23, 2019 Share Posted November 23, 2019 Its awesome! Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted November 23, 2019 Share Posted November 23, 2019 twin v twin cross cart. one normal turbo feeding both engines. 3 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 Chook woke me up at 5.50 this morning..... so just waiting for repco to open so i can get some Rtv will get side cover on put oil in it should run! Gutted the governor completely it came with a new one, to me it seems like a failure point so see ya later fun police device. This engine is drastically different to my other engine lots of plastic covers but its very cleverly assembled, the rockers are held in by a pin that is held in by nothing but gravity no tools came out till i was ready to put crankcase cover on, except for the hammer i used to punch the governor out. Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 Just dawned on me i could build something 4wd with around 60hp if i scrap the scooter..... 2 Quote Link to comment Share on other sites More sharing options...
igor Posted November 23, 2019 Share Posted November 23, 2019 That's kinda cool but also kinda sad. 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 Well im happy.! Has oil pressure accidentally pegged it on the limiter first start as a return spring was in backwards. Run 500ml of petrol through it so now i need something to put under it. 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 23, 2019 Author Share Posted November 23, 2019 1 Quote Link to comment Share on other sites More sharing options...
Muncie Posted November 24, 2019 Author Share Posted November 24, 2019 Minor fail ive assembled it on my trestle instead of the floor and now its too heavy to lift down.... forget how heavy these things are with all the shit on them i took it all off on the other engine. Will start stripping unnecessary shit off to make lighter and more compact. 1 Quote Link to comment Share on other sites More sharing options...
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