I have a banshee. I checked the lower end rod bearing there's no up and down play but there seems to be a lot of side to side play. Can that cause a wrist pin bearing to fail because I had a wrist pin bearing fail. I'm wondering if that's the problem is the lower end?
Taking apart my bottom end on my 2019 yz 250 the crankshaft assembly fell out of the case without needing to be pressed out. What would cause this or does that mean the crankshaft needs to be replaced?
hey, i hope y’all respond. my crank has a bit of side to side play, my engine has no knocking noises or anything. if i move my crank to the left it has absolutely zero play up and down, but if i move it more to the right it has probably 0.5cm of up and down play. what’s the cause? i think my bearings are fine but is this normal ?
How many hours are on the crank? Side to side play is pretty common but up and down play is no good. You also want to look at your service to see if they give a spec for play in the crank. But up and down is a sign that bearings are going bad.
PLEASE reply guys. I have a ‘21 YZ250 I’m working on. I can’t find any information.. small end free play is stated maximum of .039” in the manual. I’m currently measuring .045 overall (play from all the way left to all the way right). Please provide some insight on this as the NEW crank you measure in the video showed .040” on the dial - “out of spec” per service manual.. the same manual that recommends 12 hour piston changes. The bike has 30.2 total hours since purchased new.
Sorry it seems that I misread the information. It looks like .045 is well within the spec. .080 is the limit. I’m gonna leave it up unedited so you can comment or maybe a future searcher can find it better. Thanks!
Typically you can have it rebuilt with a new rod kit by crank specialist or replace with new. My personal bike has no oem or aftermarket crank assemblies available but rod kits seems readily available
As far as we know the the connecting rod will come with the big end rod bearing so they are not available separately. We carry the Pro X connecting rod which will work great. You could also go the OEM route but both will last a very long time.
I need help! My rod has very little side to side movements, but when I move it up and down it doesn’t have play but there’s a little very very small movement
I need a connecting rod and bearings for a 2016 Yamaha YZ-250F . Can you help me out? Can I not just replace the connecting rod if that's all it needs ? It snapped
You need to split the cases and make sure it didn't poke any holes anywhere. When my rod snapped it broke on the downstroke and left my freshly rebuilt head alone. It did however karate chop the cases, balancer, and transmission.
Hi Aris, we currently don't offer any V-blocks but are working on getting some listed. For now you could check with your local tool supplier or check with a friend or local mechanic to see if they would let you borrow some. -Charles
Yes if your installing new parts that's how you get the correct side clearance, if its used and past limit spec then its worn out (thrust washers) thinning out usually or burnt out if you were to press crank to get side clearance back to spec its just a bomb waiting to blow up
@@rmatvmc Hy my question is when is everything together and hold the flywheel and then push it in that moved a little then is normal or need to be tight?
If you have play in your connecting rod you are definitely going to hear it. I would describe it more like a "knock" more than a "tick". Ticking could be something else going on.
@@rmatvmc I’ve done the valves , cam chain , (aftermarket) cam chain tensioner, & I’m still hearing a slight tick power is very much there but it ticks I have no clue what it can be it’s driving me nuts
Charles from Rocky Mountain ATV/MC is the man. I am going to be tearing into my bottom end and this video was spot on what I needed. Thanks Charles!
Perfect thanks. Showing what a shit one AND a good one looks and feels like is exactly what we need, but very few seem to do this. Thanks again.
Perfect, answered all the questions I had. Thanks for these detailed videos!
78 HUSKY 125. Should the wrist pin needle bearing stay centered at top of connecting rod? Great video.
Thank you. Where did you get the v-blocks you had the new crank assembly sitting on, if I may ask?
These blocks are actually from our manufacturing shop in house.
I have a banshee. I checked the lower end rod bearing there's no up and down play but there seems to be a lot of side to side play. Can that cause a wrist pin bearing to fail because I had a wrist pin bearing fail. I'm wondering if that's the problem is the lower end?
Taking apart my bottom end on my 2019 yz 250 the crankshaft assembly fell out of the case without needing to be pressed out. What would cause this or does that mean the crankshaft needs to be replaced?
Ur good the bearings on one side come right out
hey, i hope y’all respond. my crank has a bit of side to side play, my engine has no knocking noises or anything. if i move my crank to the left it has absolutely zero play up and down, but if i move it more to the right it has probably 0.5cm of up and down play. what’s the cause? i think my bearings are fine but is this normal ?
How many hours are on the crank? Side to side play is pretty common but up and down play is no good. You also want to look at your service to see if they give a spec for play in the crank. But up and down is a sign that bearings are going bad.
Hi, Nice video!!
could you please help me understand, when changing connecting rod kit, do you go for over size pin or same size pin? Thanks
Where can I find a "power valve push rod assembly" for a 1995 yz125? Much appreciated!
I love Rocky Mountain, great products, great price, helpful videos and fast shipping
Glad to hear that! Thanks for being a great customer.
PLEASE reply guys. I have a ‘21 YZ250 I’m working on. I can’t find any information.. small end free play is stated maximum of .039” in the manual. I’m currently measuring .045 overall (play from all the way left to all the way right). Please provide some insight on this as the NEW crank you measure in the video showed .040” on the dial - “out of spec” per service manual.. the same manual that recommends 12 hour piston changes. The bike has 30.2 total hours since purchased new.
Sorry it seems that I misread the information. It looks like .045 is well within the spec. .080 is the limit. I’m gonna leave it up unedited so you can comment or maybe a future searcher can find it better. Thanks!
Cool thanks guys! Always learning from ya!
My lt 250r has some side to side play should I be concerned
Excellent video. Thanks.
I have a question why did the primary gear side pop out of my clutch cover ?
Do you guys sell the tool the crankshaft is sitting in?
I wonder do they have free shipping in 2023 seems like great products damn good video.
Yes, we have free shipping on orders over $75.
I was wondering if you have up and down play do you have to get the hole new crank shaft or can you replace the big end bearing ?
Typically you can have it rebuilt with a new rod kit by crank specialist or replace with new. My personal bike has no oem or aftermarket crank assemblies available but rod kits seems readily available
Do you know what are the best big end rod bearing for a 2003 cr85r
As far as we know the the connecting rod will come with the big end rod bearing so they are not available separately. We carry the Pro X connecting rod which will work great. You could also go the OEM route but both will last a very long time.
I need help! My rod has very little side to side movements, but when I move it up and down it doesn’t have play but there’s a little very very small movement
That's a good thing
its ok drive it
Wdym ? So it does have play or not?
Side to side movment is okay up and down movment is not okay@JackMacdonald-ih3ht
What is the name of the metal mounts you are resting the crank on??
They’re called arbor plates, typically used in association with a hydraulic press
@@MXAlex21 I don't know why It was so hard for me to find the name of those! Thank you!
@@MrSillypoptart no problem!
I need a connecting rod and bearings for a 2016 Yamaha YZ-250F . Can you help me out? Can I not just replace the connecting rod if that's all it needs ? It snapped
You need to split the cases and make sure it didn't poke any holes anywhere. When my rod snapped it broke on the downstroke and left my freshly rebuilt head alone. It did however karate chop the cases, balancer, and transmission.
Awesome vid
where can i get a rod for a PE 400 suzuki
hi Rocky Mountain ATV MC do you sell the V-Blocks for the crank shaft in the video as well?
Hi Aris, we currently don't offer any V-blocks but are working on getting some listed. For now you could check with your local tool supplier or check with a friend or local mechanic to see if they would let you borrow some.
-Charles
They dont need to be fancy. Wood works just fine
If there's excess side to side clearance why not just put the crank on a press and tighten the clearance a thou or 2?
Yes if your installing new parts that's how you get the correct side clearance, if its used and past limit spec then its worn out (thrust washers) thinning out usually or burnt out if you were to press crank to get side clearance back to spec its just a bomb waiting to blow up
Would this cause the engine to knock when running ?
Yes. If your crank bearing is wearing out, it can cause a knocking noise.
sure knocking and squeaky sound
@@rmatvmc Hy my question is when is everything together and hold the flywheel and then push it in that moved a little then is normal or need to be tight?
Can this cause a ticking noise on crf150r ?
If you have play in your connecting rod you are definitely going to hear it. I would describe it more like a "knock" more than a "tick". Ticking could be something else going on.
@@rmatvmc I’ve done the valves , cam chain , (aftermarket) cam chain tensioner, & I’m still hearing a slight tick power is very much there but it ticks I have no clue what it can be it’s driving me nuts
My connecting rod is in spec for side to side movement but it can twist a little bit it's this ok ? Doesn't have up and down play just twist.
Same question i can twist it a bit...
new rebuilt crank, rod will have side to side left /right play, no up and down or twist play at top of rod that's new spec, not within limit spec
Top video.....