Hi Byrnesy, will do next time I have one in the workshop. Also too there is a Rotax manual online you can download that details the steps for their engine on how to rebuild it. Couple this with the Power Republic heat torch method and you should be able to work your way through it.
Dear Sir, I have this question, maybe as many karters out there: (As I am employed in the aviation business), I wonder what is the mandatory Rotax Max long storage procedure? ( I believe it is not similar as the Rotax aviation engines😃), however I noticed similar procedures are required, such as piston seizure prevention, monthly hand cranking, 3 months inspection, moisture control etc.. Mainly the question would be, is cooling circuit draining required? (Effects on casket, shrinking when drying leading to detoriation)?
hey Adam , not sure when it comes to aviation. fuel sitting in the carbs and fuel pumps isn't awesome over time. but other than that, the engines are pretty hardy. maybe just block the exhaust and inlet to stop cold wet air entering the engines
I have a 125 max rotax motor is suppose to antifreeze in the bottom crank this is the first time I have messed with this kind of motor and I went out and started it and the piston blew up and messed up the jug when I pulled everything off it was full of antifreeze in the housing above the jug
@@PowerRepublic I think we found out what it was there was a crack going down the head like someone might of torque it to hard thank you for the reply and helping!
I have a junior rotax max and would like to know if there is a good engjne position to mount it . Ie. Distance from the sprocket carrier or bearing mount . Thanks in advance
Hi Derek, Greetings from Ireland....Thanks for another great video.....do you recommend using blue loctite on the engine mounting bolts when attaching the factory mount for use on the kart?
I have a problem with my rotax max fr125 with electronics update to the new model. at 11-12000 it doesn't go smoothly then if you keep pushing it revs up but no less forcefully. I checked all the cables, spark plug, new battery but I can't resolve anything. could you help me?
Hey John, are you asking about a brand new engine package set up on a kart? I would allow half to a full day depending on how much experience you have with them. It is all the little things that add up. Once installed, engine swaps can be done between sessions.
Yes that right, about 10-15mm at the highest spot (about the thickness of the chain either side of centre ). just remember that a looser chain is better than too tight, IMO
Would be helpful if you did a guide on how to change crankcase bearings and seals on the rotax senior
Hi Byrnesy, will do next time I have one in the workshop. Also too there is a Rotax manual online you can download that details the steps for their engine on how to rebuild it. Couple this with the Power Republic heat torch method and you should be able to work your way through it.
Dear Sir, I have this question, maybe as many karters out there: (As I am employed in the aviation business), I wonder what is the mandatory Rotax Max long storage procedure? ( I believe it is not similar as the Rotax aviation engines😃), however I noticed similar procedures are required, such as piston seizure prevention, monthly hand cranking, 3 months inspection, moisture control etc..
Mainly the question would be, is cooling circuit draining required? (Effects on casket, shrinking when drying leading to detoriation)?
hey Adam , not sure when it comes to aviation. fuel sitting in the carbs and fuel pumps isn't awesome over time. but other than that, the engines are pretty hardy. maybe just block the exhaust and inlet to stop cold wet air entering the engines
@@PowerRepublic thank you Sir!
Hello sir can you please share how to modify the engine for Rotax 125cc
I have a 125 max rotax motor is suppose to antifreeze in the bottom crank this is the first time I have messed with this kind of motor and I went out and started it and the piston blew up and messed up the jug when I pulled everything off it was full of antifreeze in the housing above the jug
is it missing one of its head o rings?
@@PowerRepublic I think we found out what it was there was a crack going down the head like someone might of torque it to hard thank you for the reply and helping!
I have a junior rotax max and would like to know if there is a good engjne position to mount it . Ie. Distance from the sprocket carrier or bearing mount . Thanks in advance
Not that I know of, normally line the crank up with the side pod bar as a general rule to start from
@@PowerRepublic Thanks for your quick reply . We have just moved up class so i'm guessing a whole load of chain lengths required 🤣🤣
What piston with cylinder clearance do you suggest , with new piston !
Hi Derek, Greetings from Ireland....Thanks for another great video.....do you recommend using blue loctite on the engine mounting bolts when attaching the factory mount for use on the kart?
Hi Brian, i don't use it myself however if I did, Blue Loctite 243 would do the job.
Thanks Derek...learned a LOT from all of your videos.
Thanks mate
I have a problem with my rotax max fr125 with electronics update to the new model. at 11-12000 it doesn't go smoothly then if you keep pushing it revs up but no less forcefully. I checked all the cables, spark plug, new battery but I can't resolve anything. could you help me?
What support are you using on the left rear of the kart furthest away from engine?
oak exhaust brackets
i’m gonna put this on a mini bike good or bad idea?
What is the little tank above the fuel tank do I need to put something in it to start or just leave it empty
nah its a regulation for the fuel tank to have an overflow breather tanks with a minimum amount of volume.
Hey, what's the recommended torque for the engine mount clamps? Cheers
Are you asking about the m10 bolts for the clamps?
@@PowerRepublic Yes those one please
What size bolts go from the engine plate to the engine block
hey Ron, m8 in various lengths from 30-50mm depending on the make and model
is this engine for a shifter kart
Nah, she's for a TAG 125cc class. same as X30 or Rok GP
How long does it take to fit the engine and wiring
Hey John, are you asking about a brand new engine package set up on a kart? I would allow half to a full day depending on how much experience you have with them. It is all the little things that add up. Once installed, engine swaps can be done between sessions.
How much power did it make??
32HP
How much is the tension in the chain?
Hi Riccardo, I think you should have 10-15mm of 'slack' in the chain. Make sure you use plenty of Chain Lube.
@@PowerRepublic But the movement should be complete (top to bottom) or something else?
Yes that right, about 10-15mm at the highest spot (about the thickness of the chain either side of centre ). just remember that a looser chain is better than too tight, IMO
@@PowerRepublic thanks a lot
w0hat is the use of the Dyno for?
running in engines and for engine comparisons
Badass. Subd
Don't use tape use the paste for the water temperature sensor
Thanks KG
I just got a Rotax fr125 Max from a guy for stupid cheap I wanna turbo it and add a EFI to it. I'm not gonna race it I wanna drift it