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MountainMax

Need Help installing 15T front Sprocket!!!!

14 posts in this topic

Hey guys, Im taking my bike out on the highway for summer holildays, wanted taller gearing, so I got me some 15/48 gearing to try, stock chain, Rear sprocket went on fine but the front sprocket im having some questions about.

Which way does the sprocket go on? it's different then the original as it has a rubber (anti vibration dampener i guess) piece molded to each side and is thicker so im not sure which side goes inward. I am guessing you install it with the '15 tooth' marked area facing outwards?

Second question there is a steel chain guard under the plastic cover and it appears to be touching my chain now, is it safe to remove this or can I modify (elongate the holes) it and re-use it, or what?

please respond ASAP if anyone knows as it's in my garage all apart now. ( a good time to change my oil while I await )

Thanks in advance........rob

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I don't know about the gear but that bit of steel that's rubbing your chain is a "case saver". It's perpose is to try to keep the chain from cracking the case in the event of chain failure. I presume you could run without it but you'll be sorry if the chain breaks. You'd be better off modifying it a tad to fit. Maybe just file off the part rubbing the chain and leave the holes alone.

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The case saver you could either elongate the holes, replace it, or grind it away. A 15T front will not clear almost all case savers with out some form of modification to it so be careful the one you buy if you opt to replace it. Elongating the holes is probably better because it allows full width for strength. Sprocket can go on either way as long as it is equal thickness. If it has a spacer or pad then it needs to ride the counter shaft in the same location as your stocker. Simply mark the counter shaft then mount the new one and see.

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The case saver you could either elongate the holes, replace it, or grind it away. A 15T front will not clear almost all case savers with out some form of modification to it so be careful the one you buy if you opt to replace it. Elongating the holes is probably better because it allows full width for strength. Sprocket can go on either way as long as it is equal thickness. If it has a spacer or pad then it needs to ride the counter shaft in the same location as your stocker. Simply mark the counter shaft then mount the new one and see.

i didnt have to mod my case saver to get my 15t on. its a tight fit but can be done

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I didnt have to mod my case saver either. Just had to loosen it up and it shifted enough to fit.

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Thanks guys, I ground a bit off the saver and before tightning up the screws I moved it as far forward as it goes, cleared no problem

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I dont know why its called a case saver. That thing is not going to save anything when a chain bunches up in the countershaft. The only thing its going to do is crack the case at the screw holes. I honestly dont know why they put those things on there

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I dont know why its called a case saver. That thing is not going to save anything when a chain bunches up in the countershaft. The only thing its going to do is crack the case at the screw holes. I honestly dont know why they put those things on there

They do work.....

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the few times I have seen a chain break, I have seen it bet bunched up and break the cases where the screws mount the case saver. Maybe it was just my situation

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I've already seen a couple of those stock case savers destroyed and the case broken after a chain broke. I don't have any faith in them so I made my own out of a 5/8 cutting board and I made it long enough to prevent the whipping action of the chain from slapping the case. Then I just put the stock one over it for added strengh and looks.

chain.jpg

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T.M. Designs better watch out for you Bean !!:thumbsup: That's cool, I'm going to see if the wife will miss her cutting board right now. WR Dave

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Case saver worked on my xr400 years ago. My chain broke over a jump and the chain spit right out of the back of the bike.

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Case saver worked on my xr400 years ago. My chain broke over a jump and the chain spit right out of the back of the bike.

Thats because its a tank.

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