I got this posted over in the Uforce Section But I think it applies to the Z Force as well


Picked up a 2014 UFoce 800 side here on the East Coast of Canada. It is a basket case and in need of repair and rebuild as it has engine issues. It came with a disassembled engine with a broken crankcase, a replacement good crank case that is split in half and a box of parts (some used, some broken, some new). I know I will need to buy a few parts as all are not there to complete the engine rebuild. I have done rebuilds in the past (Artic cat Wildcat 1000, Motorcycles etc) so the rebuilding is not an issue as long as I have a good service manual and parts diagram. I do have the UFOCRE CF800-3 service manual and I have looked at the parts diagrams on line. The rebuild seems pretty straight forward, but I do have some concerns on replacement parts as there are a few items that have multiple parts with different "Mark" numbers and it doesn't really say why or specific use. A phone call to my CFMOTO dealer did not help much. So I am reaching out to see if any members can provide advice/assistance.

OK so here it is

Crankshaft: Parts diagram says there is a Crankshaft A or B. It does not say why or if it makes difference what crankcase you have. So I am assuming Crankshaft A or B will fit in the crankcase I have.  I did see and read that the bearings for the crankcase need to be either Blue (B Crankcase) or Red (A Crankcase). My replacement Crankcase, both half cases are stamped B so I need replacement 2 x Blue bearings for each half of case for  the Crankshaft.

Connecting Rods: Parts Diagram shows 2 different connecting rods,  Mark I and a mark II as well as several differ color plain bearings (Red, Blue, Black) for the big end of the connecting rod that connects to the crankshaft pin.  I also see the article in the manual on which plain rod bearing goes with each rod (Mark I or II) and the relations ship to the Crankshaft A or B so that is not an issue. What the manual does not say why there are Mark I and II rods and where to use them.

Pistons: Parts diagram show 2 different pistons, and photos on line show them marked as "I"  (on line dimensions says 90.94-90.95 MM) or marked as "II B"(on line dimensions 90.95-90-96 MM) but again the manual does not say why there a 2 different pistons listed (and in this case Mark II B is  a bit bigger than Mark I) or what cylinders they are for (are the interchangeable between front (Cyninder #2) and rear (cylinder #1)).

Cylinder Sleeve: The parts diagram shows a Mark (stamp) on the side and I see this stamp  as I have 2 cylinders; It has a number 1 on one and a number 2 stamped on the other. I see on line the measurement of 90.96 mm listed for the Cylinder. Other than the number stamp, there is no difference with the cylinders and the manual does not state which cylinder goes in which cylinder location in the crank case.  Does this stamped number refer to the Front Cylinder which is cylinder #2 and the rear Cylinder which is cylinder #1 as per the manual?

So after further reading on line, AI (evreyones friend......) AI says for proper engine function you must use the complete corresponding set; a Mark I piston requires a Mark I Connecting Rod and a stamped 1 cylinder (which is rear cylinder if placed as per my comment above).  So if that is the case, then for the Cylinder stamped 2 (The Front Cylinder and piston) it would need a Connecting Rod Mark II and piston II B.
 
If you go this way, you now have 2 different size pistons in the cylinders sleeves, be it only by .01 MM, (as per the Piston measures I stated above)

Any comments on this configuration, is this out to lucnch, make sense etc,

As for replacement parts, I see online several sites that offer the Crankshaft with the connecting rods attached for a very good price. Anyone purchase one of these and if so any comments. The store site does not list if it is a Crankshaft  A or B assembly or what connecting rods it includes (Mark I or II),  While this is not an issue as it will have the bearings already installed;  it is an issue if the connecting rod Mark  (I or II) Needs to be  the same as the piston mark I or II.

Has anyone in Canada bought one of these and if so did you have to pay import tariffs (the checkout cost on the website does not say if it is subject to tariffs)

Sorry for the long post, but hoping someone who may have done a rebuild or repair can provide some insight or inform before I start ordering to make sure I get the correct parts

Thank you in advance.

Hi fellow CFMOTO Folks,

Picked up a 2014 UFoce 800 side here on the East Coast of Canada. It is a basket case and in need of repair and rebuild as it has engine issues. It came with a disassembled engine with a broken crankcase, a replacement good crank case that is split in half and a box of parts (some used, some broken, some new). I know I will need to buy a few parts as all are not there to complete the engine rebuild. I have done rebuilds in the past (Artic cat Wildcat 1000, Motorcycles etc) so the rebuilding is not an issue as long as I have a good service manual and parts diagram. I do have the UFOCRE CF800-3 service manual and I have looked at the parts diagrams on line. The rebuild seems pretty straight forward, but I do have some concerns on replacement parts as there are a few items that have multiple parts with different "Mark" numbers and it doesn't really say why or specific use. A phone call to my CFMOTO dealer did not help much. So I am reaching out to see if any members can provide advice/assistance.

OK so here it is

Crankshaft: Parts diagram says there is a Crankshaft A or B. It does not say why or if it makes difference what crankcase you have. So I am assuming Crankshaft A or B will fit in the crankcase I have.  I did see and read that the bearings for the crankcase need to be either Blue (B Crankcase) or Red (A Crankcase). My replacement Crankcase, both half cases are stamped B so I need replacement 2 x Blue bearings for each half of case for  the Crankshaft.

Connecting Rods: Parts Diagram shows 2 different connecting rods,  Mark I and a mark II as well as several differ color plain bearings (Red, Blue, Black) for the big end of the connecting rod that connects to the crankshaft pin.  I also see the article in the manual on which plain rod bearing goes with each rod (Mark I or II) and the relations ship to the Crankshaft A or B so that is not an issue. What the manual does not say why there are Mark I and II rods and where to use them.

Pistons: Parts diagram show 2 different pistons, and photos on line show them marked as "I"  (on line dimensions says 90.94-90.95 MM) or marked as "II B"(on line dimensions 90.95-90-96 MM) but again the manual does not say why there a 2 different pistons listed (and in this case Mark II B is  a bit bigger than Mark I) or what cylinders they are for (are the interchangeable between front (Cyninder #2) and rear (cylinder #1)).

Cylinder Sleeve: The parts diagram shows a Mark (stamp) on the side and I see this stamp  as I have 2 cylinders; It has a number 1 on one and a number 2 stamped on the other. I see on line the measurement of 90.96 mm listed for the Cylinder. Other than the number stamp, there is no difference with the cylinders and the manual does not state which cylinder goes in which cylinder location in the crank case.  Does this stamped number refer to the Front Cylinder which is cylinder #2 and the rear Cylinder which is cylinder #1 as per the manual?

So after further reading on line, AI (evreyones friend......) AI says for proper engine function you must use the complete corresponding set; a Mark I piston requires a Mark I Connecting Rod and a stamped 1 cylinder (which is rear cylinder if placed as per my comment above).  So if that is the case, then for the Cylinder stamped 2 (The Front Cylinder and piston) it would need a Connecting Rod Mark II and piston II B. 

If you go this way, you now have 2 different size pistons in the cylinders sleeves, be it only by .01 MM, (as per the Piston measures I stated above) Any comments on this configuration, is this out to lucnch, make sense etc,

As for replacement parts, I see online several sites that offer the Crankshaft with the connecting rods attached for a very good price. Anyone purchase one of these and if so any comments. The store site does not list if it is a Crankshaft  A or B assembly or what connecting rods it includes (Mark I or II),  While this is not an issue as it will have the bearings already installed;  it is an issue if the connecting rod Mark  (I or II) Needs to be  the same as the piston mark I or II.

Has anyone in Canada bought one of these and if so did you have to pay import tariffs (the checkout cost on the website does not say if it is subject to tariffs)

Sorry for the long post, but hoping someone who may have done a rebuild or repair can provide some insight or inform before I start ordering to make sure I get the correct parts

Thanks you in advance.

Hi everyone, I have a 2015 UFORCE 800 that I did a rebuild on. Engine is back in and it starts the first try. howver i notice the front exhaust pipe glows red after about 30-50 seconds. the rear exhaust pipe is ok. I checked the coolant and it seems fine, even pulled the theromast and going without one to make sure the engine is getting good coolant, both coolant lines get warm so that tells me coolant is flwoing through the engine AND iI get a nice swirl of the coolant at the rad fill tube. Can it be a timing issue as I had someone tell me to be careful with timing as it can be tricky. Thought it might be that it is running lean, but i do have the filter air box in place. when I pulled the plugs, they are OK and not fouled. Anyone have any thoughts or had this issues.

TIA

Craig

Thanks for the info. Picked up a used Crank and rods that were ok and put that in. Engine is back togther and back in the machine, and starts up pretty easy, but have another issue in that the frint exhaust glows red hot after about 30-50 seconds of running so not sure if it is a timin issue or something. Will post a new thread to see if other folks had the problem or have insight, again thanks for the info

Hi Everyone,

Looks like I am having Crankshaft issues with a 2015 UForce 800 I picked up for a good price that needs a rebuild as it threw a connecting rod and wore the crankshaft. given the cost of a new crank, I am looking tat he the option some folks did with having the crank ground and using the toyota bearings that fit. When I went to the post, I did get the picture and down loaded it but I can read what Toyota bearing they used as I can't read the info on the bearing package. Anyone have the info on what the Toyota bearing was they they use for this.

TIA

Craig

Just picked up a used 2010 CF Moto SWAT 500. Got som eissues so looking for any technical info such as a service manaul, manual for the eninge, wiring diagram etc etc.  Is the engine specific or is it a generic engine that is used in this UTV, or is it in other models made by CF Moto or other UTVs made by a different brand.

Any info greatly appreciated

Thanks

Craig

How do i by pass it.

I got a lead on a 2014 600 snyper.  Price is good, but it needs a passenger seat and a front hood.  Owner also says it has a Rev limiter problem. Tried reading up on it but not finding much on it.  What is the Rev limter for, is it part of the Computer or it is built into the engine.  I found one site where it says it is a control device built into the carb that is normally removed after the initial break in on the first servicing, is this correct. Also some one said it is a electronic control.  How hard is it to fix, anyone fix it before.  Anyone have a picture or diagram where it is located

Just wondering what it is before I decide to buy

Thanks