Anyone try a 52T sprocket?

[mjbd]

Anyone try a 52T sprocket on a YZ250F to try and ride 3rd gear through more of track? I was riding my buddies track last night, and he told me I should try gearing it up so that I can ride 3rd gear through more of the turns. 2nd gear can tend to sign off a little soon for some of the jumps coming out of corners, so if I could pull the corners in 3rd gear, I should have enough rev to keep the power surging as I go up the face of the jump. I personally prefer to keep the R's down, and ride the mid range power as much as possible. So this may sound weird to gear it up, but by doing this we are hoping to ride 3rd gear, and only have to shift to 4th on the high speed sections. I am a back half of the pack novice motocrosser so anyone who is wondering. This would obviously make little sense for a more advanced rider, but we are hoping it works out for me.

[Sider_steve]

If a 52 tooth sprocket is bigger than your sprocket,you would be gearing the bike down,not up.

And stock on my bike is a 48 tooth,so you would be changing by 4 teeth if your stocker is also a 48.

Not sure what year your bike is or what mods have been done to it.

My bike has a 45 tooth on the rear,but I ride mostly trails and fire roads with it. It seems to love corners in third gear,but I am on a fairly hard packed surface.

[renrek]

52 would be a bit too steep, in my opinion. 51 works on most tracks for me but runs out of steam on longer straights and long jump approaches. After you get used to the bike and get better, you'll find that going to a 50 will allow you to go a bit faster than the 51 and still be able to get through corners without excessive clutch fanning.

[mjbd]

If a 52 tooth sprocket is bigger than your sprocket,you would be gearing the bike down,not up.

And stock on my bike is a 48 tooth,so you would be changing by 4 teeth if your stocker is also a 48.

Not sure what year your bike is or what mods have been done to it.

My bike has a 45 tooth on the rear,but I ride mostly trails and fire roads with it. It seems to love corners in third gear,but I am on a fairly hard packed surface.

Its increasing the final drive ratio, thats why I said gearing it up. Either way its going to shorten every gear, so I can see how it would be considered gearing it down. Its a 2008, so the stock gearing is a 49t. I wanted to buy two sprockets on each end of the spectrum, so I have a 52T and a 47T coming. I wanted to make sure it was going to make a big differance, so I could decide if I wanted to make adjustments from there. If the 52T seems good, but runs out of steam just a tad to quick, I will try a 50 or 51. Obviously 1st and 2nd gear will rev out really quickly, but the plan is to not need those gears. It will also be good to play around with gearing, so that we can make appropriate changes for the track we are going to. If its more wide open with sweeping turns, a 48 or 49 would be good, on tighter tracks with jumps coming out of the turns, maybe 50-52 may be best.

[Sider_steve]

Its increasing the final drive ratio, thats why I said gearing it up. Either way its going to shorten every gear, so I can see how it would be considered gearing it down. Its a 2008, so the stock gearing is a 49t. I wanted to buy two sprockets on each end of the spectrum, so I have a 52T and a 47T coming. I wanted to make sure it was going to make a big differance, so I could decide if I wanted to make adjustments from there. If the 52T seems good, but runs out of steam just a tad to quick, I will try a 50 or 51. Obviously 1st and 2nd gear will rev out really quickly, but the plan is to not need those gears. It will also be good to play around with gearing, so that we can make appropriate changes for the track we are going to. If its more wide open with sweeping turns, a 48 or 49 would be good, on tighter tracks with jumps coming out of the turns, maybe 50-52 may be best.

You are on the right track there

[mjbd]

Would going down a couple of teeth on the rear essentially accomplish the same thing? What I mean by this, is the problem is with the power signing off to soon on the faces of jumps in 2nd gear, but I am currently unable to carry 3rd gear through these turns. By going down a couple of teeth on the rear, wouldnt that keep the power surging longer in 2nd gear? Or will it become a complete dog?

[Sider_steve]

Would going down a couple of teeth on the rear essentially accomplish the same thing? What I mean by this, is the problem is with the power signing off to soon on the faces of jumps in 2nd gear, but I am currently unable to carry 3rd gear through these turns. By going down a couple of teeth on the rear, wouldnt that keep the power surging longer in 2nd gear? Or will it become a complete dog?

That would be something I would test out on my own.

If your bike has very strong bottom and midrange power and can pull the bike through some of the loose soil conditions found on some tracks.

With my rear sprocket being 3 teeth smaller,it will pull the corners in 3rd.

But I am not racing or trying to clear doubles or triples.

The bike does build power a little slower,doesn't slam right to the rev limiter.

And with a touch of the clutch you can rip out of corners pretty good.

[madmaxter39]

Everyone likes different things and mostly depends on how your track is laid out. My son, whom is a mid pack beginner, prefers the 50 tooth sproket on his 07. It has a pipe and the 08 piston and seems to pull very nicely on all of the sections of the tracks he races.

Only way to know for you though, is to try some different sprockets and see what works best for you.

Good Luck and enjoy

[ndestito]

i ride with a 52 tooth and it works for carrying gears through the corners better, i still use the clutch coming out of the corner if that helps any

[oldnbold]

52 seems too much to me. If it takes a 52 to get to the "3rd gear rule" as i call it for corners then I suggest you also do some jetting. A 50 or 51 should do the trick unless you're extremely heavy or you're at high altitude.

[thefullmonte]

I put a 52 tooth on the rear of my girlfriends bike and it is day and night difference. We do mostly woods riding, but some moto too. The bike pulls much better and clutch abuse is brought to a minimum. Which for a novice rider can be a big help. Makes the bike much easier to ride and will be less likely to stall if you land a jump a gear high. Go for it, I think you will be very happy with the results.

[mickeysofia]

I have a 08 yz250f myself and was thinking of going to a 51 or 52 for some more pull down low, could I still use the stock chain as the bike is still new maybe 3 hours.

[thefullmonte]

I have a 08 yz250f myself and was thinking of going to a 51 or 52 for some more pull down low, could I still use the stock chain as the bike is still new maybe 3 hours.

Very doubtful, I think you will be about 3 links short.

[Sider_steve]

I have a 08 yz250f myself and was thinking of going to a 51 or 52 for some more pull down low, could I still use the stock chain as the bike is still new maybe 3 hours.

Stock chains are junk anyway.

Not made of the best materials.

Keep it to use if you want to go back to stock gearing for any reason.

[mickeysofia]

so if I go for the larger sprocket should I go 51 or 52. most of my riding is tight track and alot of tight trails. I am 198lb. 08 yz 250f. I will need a longer chain how many links longer than stock.any suggestions on chain & sprocket manufactures. thanks mickey

[Sider_steve]

so if I go for the larger sprocket should I go 51 or 52. most of my riding is tight track and alot of tight trails. I am 198lb. 08 yz 250f. I will need a longer chain how many links longer than stock.any suggestions on chain & sprocket manufactures. thanks mickey

RK makes good chains. 51 tooth would add 2 links 52 would add three links.

As for sprockets steel will last longer,but aluminum weighs less.

MSR makes a nice looking steel sprocket.

[ndestito]

sorry rear sprocket is a 51 tooth, gonna change that cause it winds out too quick

[RMX534]

I ride a 2007 yz250f i messed around with the gearing on mine. I found a 51 was a lil steep n it had nothin up top so i dropped to a 49 and its much more well rounded. 51s ok for a tight track but long straights will kill u.

[mjbd]

I finnally got a good ride with my 52t rear sprocket. 1st and 2nd are now useless, but 3rd and 4th are all thats needed now. I can pull 3rd easily in ever the tighter corners, and it still revs out much longer than 2nd use to with the 49t rear sprocket. The gears definately rev out quicker, but now I can carry 3rd through most of the track. Its definately not for everyone, and once I have motowerx port my head, I will probably switch back the gearing, but for now it doesnt work half bad.