Chain guard solution 1987 Quadrunner LT230E

[Yamahahahaha]

I'm in the middle of repairing damage from the chain coming off of this from the previous owner. (I learned this is somewhat common on these for various reasons.)

What are you guys using to either help keep the chain correct and on the sprocket or guarding your engine in the case that it comes off / breaks?

Is there an upgraded guard that can bolt around the sprocket in replacement of the currently broken OEM alluminum?

[Yamahahahaha]

I have learned recently how hard the sprocket drive retainer is to source 😐

Has anyone found a replacement for these anywhere online or should I focus on salvage yards for one?

[davefrombc]

That sprocket  looks like the reason the chain came off.  I would replace it before worrying about retainers and chain guards.  I really can't tell from the picture  but do you know someone who may be able to  fab  one up for you?

[Yamahahahaha]

Yeah, you saw those chipped teeth too eh? 🤪 I ordered a new 12T for it from JT, when it gets here i can use its diameter to fab my own guard, I was just curious if there was a better way to keep the chain proper or the best options for guarding. I can build the guard to replicate the ones they sell that are super close to the sprocket and chain. I figured I would also make it a safety cover for pants and such. This is the first chain drive toy Ive owned, My Yamaha and other suzuki are both shaft powered 😅

I also realized its missing the upper chain roller on the swing arm (learned this is a model H) and because the previous owner ran it like this he did some minor damage to the swing arm and probably threw the chain from it slapping like hell on decceleration. 

[Yamahahahaha]

So a quick update on this topic: I have replaced the front sprocket with a 12T, however the retainer plate is snapped in 4 pieces and is missing a few chunks that hold the bearing and seal in for the transmission 🫥

(#46 in the link shown below's diagram)

So i will have to purchase a new old one. I found a few sites I can order them from, but I have heard people having to add a back plate and get it machined due to model year differences. Im trying to avoid this if I can.

Has anyone had this issue or ordered a new retainer plate? Where did you order it from? How did it fit? 

I have read this post from 2021 where a member repaired their ride with an off year part and new bearings and spacers, so that gives me hope.

 

Edited April 30 by Yamahahahaha
spelling mistakes

[Gwbarm]

Parts can be fairly model specific on rtheses older machines i would look closely at the photos of the new old one and see if it is the same, may have to visit a salvage yard and look around other than that try to get the old one welded or refabricated by a machinist.

[Yamahahahaha]

Ok, so after contacting 2 junk yards, scanning eBay, weighing my options, and reading the previously shared thread from this forum, I decided to buy the only available type of retainer plate and move forward.

Retainer plate part number: 24751-35B10 (branded on part as S2B-35B1-RD) ordered from link below

https://www.partzilla.com/product/suzuki/24751-35B10?gad_source=1&gad_campaignid=17883222394&gbraid=0AAAAADro4HsbmVHHTMFPG7M0M6QiIC6IH&gclid=CjwKCAjwqazPBhALEiwAOuXqdI1Cqfwv6ijcXwLtsuFOGwt4qMvNMgcmUNhCKUZ7o5VCGib2S2fpZhoCbTAQAvD_BwE&titan_sku=24751-35B10

It was delivered and as expected is unfortunately not for a model H. So i will be updating the required parts to make the quad a "not model H" 😄

After some thourough research, diagrams, parts lists, and back and forths, here is what I will be ordering to update the quad to the new retainer so no machining is required:

(1x) 22mm ID x 2mm thick steel washer (7/8" ID will work, but couldnt easily find one that is 2mm / .08 inches thick, needed to space sprocket properly)

(1x) 21mm ID 2.5mm width O-ring

(1x) 71mm ID 2.65mm width O-ring (closest I could find to the required 71.9mm x 2.5mm)

(1x) Oil Seal 40mm x 52mm x 8mm

(1x) 6206 30mm Bore 62mm OD 16mm thick Bearing

Going this route will make it easier to replace parts in the future by eliminating the obsolete Model H parts and also saves a lot of money not buying suzuki branded parts. Just use the info above for sizes.

It took my cost from $107 suzuki cost to $37 and I was able to find it all on Amazon. I will also have extra O-rings since they come as a pack.

I will update back when i have all the parts in hand 🫡

[Yamahahahaha]

Here is the old plate, easier to see with it off the quad. It was barely hanging on 🫣

[Gwbarm]

Excellent reasearch figuring that out, im sure it will help others with the same problem. Good luck hope it works out.

[Yamahahahaha]

Ok, update time. I finally got all the parts in (had to wait forever for the last O-ring to get shipped) and everything went together great!

I used some silicone grease to hold the largest o-ring to the crankshaft opening while i assembled it so it would stop falling onto my garage floor. The oil seal is a bit tricky, if you push the spacer into it hap-hazardly you will knock out the spring retainer that holds the seal tight. I actually put the spacer into the retainer plate and then slid both on at the same time so that i knew the spring was good.

1x of the 2mm thick washers was needed to push the front sprocket outward for alignment to the rear sprocket.

[Gwbarm]

Good job getting that fixed without using the unobtanium part. Took a little bit to figure out what you needed to make it work but you did it. Excellent!

[jen]

Clean working area....impressive.