Honda st90 engine swap. In the illustrations, the engine looks to be the same configuration as the 50/70/90. The inner parts,trany,crank,if I'm correct are the same. Feb 3, 2025 · Looking for the ST90 motor guard/cradle, if you have one to sell let me know! The Honda ST-series minibikes are known as the Dax in Japan and Europe, and the Trail 70 in Canada and the US. Then I was hit a major problem. The top end parts are different but can be interchanged,The outside diameter of the cupper head gasket is Nov 12, 2021 · I remember clearly his dad purchased a brand new 125m (1984??)and promptly had someone swap the engine 0 miles!!!! If I remember correctly he never got it running due to an interference with the frame and carb or intake??? Nov 19, 2009 · A Lifan 125 will have the same mounting bolt pattern as a Honda 50 or 70, not the same as a CT/ST/ATC90 and 110. *Seized* Serial # ST90E-1009804 All engines have been checked to make sure they turn over and will be noted if they don’t. This is a common swap and has been performed on hundreds of bikes (I've got a 1971 C90 as well, waiting in my garage to get it's own Lifan). *1EA OEM HONDA +. It was cheaper for this Loncin 110 to go inAlso, May 10, 2017 · The ST90 is roughly 3/8” wider at the engine mount, over a CT70. Perfect for DIY enthusiasts or professional mechanics. The lower engine mount is the one that doesn According to the Honda Motorcycle Identification Guide, Honda made the ST90 Trailsport 90 from '73 thru '75, and it had an 89cc OHC single with a 3-speed automatic clutch. I suspect that these engines were detuned with lower compression and milder cams, possibly even fixed spark timing. Aug 21, 2020 · Anyone here own a Honda st90 and a Honda Grom wondering if the bolt pattern for the engine mounts are the same? Picked up this recently and looking for a bolt in bracket to put zs190 in it. The *OEM HONDA FLYWHEEL PULLER (SEE APPLICATIONS) (0010000"T") 07933-0010000 1. *OEM 1EA HONDA CAM SHAFT SPROCKET OEM HONDA CT90 CT110 ATC90 ATC110 ST90 (311T) 14321-028-000 IF YOU NEED THE BOLTS CLICK HERE NOS (New Old Stock) Honda ATC90 CL90 CT90 S90 SL90 ST90 Cylinder Head Gasket 12251-028-030. Swap Shop Racing, Engine Swap Specialist. saved us some headaches. Jun 21, 2017 · Greetings. #HondaST90 #HondaCT70 Jun 1, 2011 · I have a '75 ST90 in stock form and have been riding it around town and to and from work. I need lots of parts this thing needs a engine rebuild and it has no spark I am looking for a repair manual. It needs paint and a seat,but its all there and the engine turns over. Entirely new wiring, 12v system, new controls, lights, brakes, tires. I don't ride it very of Jun 23, 2020 · Bid for the chance to own a No Reserve: 1975 Honda ST90 at auction with Bring a Trailer, the home of the best vintage and classic cars online. Our 2mm thick adapter brackets ensure durability, we've thrash tested these adapter brackets on a 190cc 5 speed swapped Honda ST90. Just drilled two holes then welded nuts on either side for added support on the frame where the new mount bolt goes. 50 RING SET ATC90 CT90 CM91 CL90 S90 SL90 ST90 W/OE PISTON (24JJ 1 EA OEM HONDA RINGS 13030-028-005 OR 13011-121-762 THIS LISTING IS FOR 1 SET OF Can anyone out there tell me what other Honda engines will bolt directly to the ST90 frame without modification? Are there any higher displacement aftermarket engines available that are direct bolt in's for the ST90 frame? Thanks! Nov 1, 2009 · The basic engine is the same as they use in (proper) monkey bikes so there is a large aftermarket spares/accessories availability. The two transmission shafts, the shifter drum, the detent arm and plate and the shift arm and shaft all were taken from the S90 engine and put in the ST90. The ST90 finally ran, but wouldnt charge. St90 engine swap (lifan) First off, thanks for approving my request to join the forum! I'm a long time lurker and big time Honda fan. I ordered the rear engine mount adaptor from dr atv and then took the bike over to a guys house who builds flat track bikes and drag cars to have the top mount looked at. Its the older atc110 with points and 6v electrical, I thinke 82/83 they came out with the cdi model. The other day i saw a posting about someone selling/wanting Honda st90 parts/bikes. Yes and no. It’s been one problem after another. The seller has this 1973 Honda ST90 TrailSport listed here on eBay in beautiful Flagstaff, Arizona and I'm going to try 1973 Honda ST-90 What was your intended objective when you started the build? To have fun with it and see what we could come up with, and try not to die! :p Mar 7, 2016 · If you want to keep the high/low range, electric start, CDI ignition and 12v electrics and get a huge power and torque upgrade, I recommend going to the trouble to swap in an '84-'85 ATC125 engine. I found a couple engine swap brackets online but none are made for the ST90 unfortunately. 5. Aug 12, 2008 · The ST90 was rated at 5. fyg4rxk6q0dtcm4md6jauofnzcpyoesnvpjwn2ikx