McFlerry Posted September 23, 2017 Report Share Posted September 23, 2017 Looking to build the motor as it just blew up. Is it worth investing in the cheetah kit or should I just build stock motor change gearing and spend money on suspension and other mods instead. Cheers Quote Link to comment Share on other sites More sharing options...
pp13bnos Posted September 23, 2017 Report Share Posted September 23, 2017 Depends on your budget. I say depending on your riding type, build a cub or serval and the suspension. 1 Quote Link to comment Share on other sites More sharing options...
McFlerry Posted September 23, 2017 Author Report Share Posted September 23, 2017 I'm gonna just run the roads with this thing got some good twisted sections near where I live so it's all I want it for. Just not sure if it's worth the money into the cub or not. Quote Link to comment Share on other sites More sharing options...
spurdy Posted September 23, 2017 Report Share Posted September 23, 2017 Better value wise to spend the money on a cub when you look at what it costs dollar per hp. But if you already got good stock cyls, you may be better off going that route unless you trying to get a motor to a specific point. Stock cyls can perform well. I have 2 stock 4 mil motors that make 80 and 105 hp. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
McFlerry Posted September 23, 2017 Author Report Share Posted September 23, 2017 Well motor just blew on me so I was gonna do a whole rebuild anyway. Any idea if you need to upgrade cooling with the cub or carbs or anything or is it just a straight swap out? Quote Link to comment Share on other sites More sharing options...
spurdy Posted September 23, 2017 Report Share Posted September 23, 2017 Any motor will run hot regardless of it isn't set up right. A cub can run on a stock radiator. As far as a straight swap, I've no clue in your situation. Many parts can be used from a stock motor. I've no idea what you mean by "your motor blew". That's like saying "it has had the balls run off of it". It gives no details. Is the crank good? Are the cylinders good? Cases good? Pistons good? Etc etc. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
McFlerry Posted September 23, 2017 Author Report Share Posted September 23, 2017 Well I know the kit comes with heads, domes, new combustion Chambers and what not. All that's blown on mine was the head gasket but it sized right after so it won't budge when I kick it. Haven't cracked cases yet but I know the gasket went. Quote Link to comment Share on other sites More sharing options...
spurdy Posted September 23, 2017 Report Share Posted September 23, 2017 So it would possibly need pistons, rings for sure, maybe a crank, and the cylinders are probably fine after honing and possibly a bore to the next size. Would have a lot cheaper to repair that then to change to a cub. Assuming stock stroke (details) so a stock stroke cub would be a direct swap. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted September 24, 2017 Report Share Posted September 24, 2017 For a cub to run "right" it needs much bigger carbs ( that means intakes too) stock reeds are going to choke it it breathes much better so pipes are a good idea and a cool head with large bore domes. To do it right will not be cheap. looking at a 4mm serval build myself. Luckily I already have the crank, intakes and carbs Quote Link to comment Share on other sites More sharing options...
McFlerry Posted September 25, 2017 Author Report Share Posted September 25, 2017 It's gonna be pricey I know that much I got a budget for it though and go in expecting. Can you get away with running like 94 in it or do you need higher octanes. Also what sized carbs would you need to go with I think 36 is recommended for the cub. Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted September 25, 2017 Report Share Posted September 25, 2017 You can run 87 if the compression is set right. figure out who is going to be your "builder" even if you assemble it. ask the builder what he recommends, then do it. If you are totally honest with what you want out of it, the builder will do his best to get you what you want. Quote Link to comment Share on other sites More sharing options...
McFlerry Posted September 25, 2017 Author Report Share Posted September 25, 2017 Alright. I want to do the build myself but I'm newer to two stroke so just trying to get opinions deffenitly going to consult with someone before going crazy and have it looked at before installed. Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted September 25, 2017 Report Share Posted September 25, 2017 2 strokes are stupid simple to assemble. If you have done any 4 stroke builds a banshee will be a piece of cake to assemble. A cub is a peaky engine to build, what do you plan on doing with it? trails and just fun riding with a little drag racing thrown in, a serval would be better. on the pipe all the time? Cub is the a much better fit for that riding. Getting close to winter project time for me, My bike will be torn down rather soon, debating on whether to rebuild the engine that is in the chassis, or go with the spare bottom end. Going to build both eventually, since my wife has a banshee as well and the engine has not been open in 14 years.... 64.25mm bore no porting stock original crank t-5's and boysen rad valves, uncut fenders (really nice ones at that) Quote Link to comment Share on other sites More sharing options...
spurdy Posted September 25, 2017 Report Share Posted September 25, 2017 Carb size will be dependent on motor set up, porting, etc. you keep just talking cub but that is generic. You can do a stock stroke cheetah cub to a large stroke super cub and cc range from less than 400 to over 600. So many things with change depending on what you build and how you set it up. I have 2 4m stock cyl motors. One runs 35mm carbs and the other runs 39mm carbs. Set ups are completely different. Motors almost identical. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.