Carl Walichnowski
Active Member
Thanks for the input & the pics Gary. I have the sproket/hub adapter for the rear sproket so with that would you still go with the 415 chain? Even though the 41 chain may be the more expensive chain & I happen to just have 10 foot of it laying around I was unsure if it'd be practical to use, would it be overkill due to its thickness, especially considering I'm only riding a couple of miles a day on level streets?? So with the Grubee GT5A SkyHawk the engine sprocket will only fit the 415 adequately? You mentioned the engine sprocket is to wide for a 410 but that sproket is okay to fit the 41 right? After reading all this feedback & from what I've read elsewhere I'll probably go with the stock 415 chain that came with the kit, at least initially anyway.I think a picture is worth, well you know. So I went and grabbed a hand-full of new sprockets from various suppliers off of my stack, and popped the cover off a new grubee gt5a "which I will be returning to motorized bikes usa". I'll share that with the forum later. Note only the two top sprockets are narrow enough to accept a 410. Most of the suppliers sprockets will not, and while the sprocket for the rear wheel supplied in the grubee kit will accept 410 the sprocket on the engine will not. It is to thick. Check the gear on the engine Carl before you go buying chain. I would love to be able to use bmx 410 and I do on the secondary chains of the jack shaft, but it's not gona work for you on the engine sprocket. Sorry about the repeat pics.. I'm kinda computer stupid so I can't figure out how to get them off.