Picking up an older monster

[Cheadle240]

Wanna get this used Monster that’s got some age and mileage on it, it has all the history and has been used by two other before me. Although, I want to make sure I’m not walking into a headache. For those of you who’ve owned or wrenched on older monsters, are there any specific red flags I should be on the lookout for? like stuff that isn’t immediately obvious on a test ride

 

[MasterMonster]

Beyond the usual checks, I say prioritize checking the desmo service history, specifically the valve clearances and belts!! If you don't see receipts for those being done on time, which is usually every 2 years or 15k miles for the older air-cooled bikes, assume you'll need to do them immediately.. though that's going to be an expensive welcome gift! Also check the condition of the wiring harness near the steering head for chafing. It's a known weak spot, especially on the early fuel-injected bikes. Also look closely at the fuel tank for swelling or bubbling paint. It's a serious issue on the plastic tanks of the S2R/S4R era as ethanol can mess them up. Finally, check the clutch slave cylinder for leaks.. the stock ones tend to fail, but it's an easy and common upgrade.

 

[icec0ld]

+1 @MasterMonster Make sure you check the clutch and timing belts. These are known wear points and if they have not been replaced on schedule that can get expensive fast. You also need to watch for the chain and sprocket wear plus oil leaks around gaskets. Another weak spot is the rear brake performance. Afaik, some models are known for spongy or fading brakes that are hard to bleed properly.

 

[bigbrain$]

Don't forget to check the fuel tanks. Afaik, older Monsters are known to swell from ethanol exposure. Stators or regulators wear out over time. Make sure that you check these parts if they have been replaced or upgraded. It can spare you from unexpected issues down the road.

 

[thiago_tavares]

Perform a complete inspection.
Sparks plugs, timing belt, timing belt tensioners, bearings, fluids, valve adjust, brake pads, chain, tires and al the seals.

I don't know what model do you got, I have a 2010 one, with 90k km, I did not have any cronical problem. Jus usual maintenance.

Good luck with the bike.