Joined
·
225 Posts
A word of warning - my big end has just blown after 20,500 miles (of which 3,000ish were with a 155kit [piston less than 10% heavier], but back to stock for last 1,000 miles). Now looking at having to get a complete new crank and rod. As I've done all my own servicing (with the help of the offical Grom Service Manual), Honda might very well refuse to honour the warranty. The bike has been ridden gently, with a +1 front cog to keep the revs down. It has always been warmed before riding, and I only very rarely enter the rid line. I have never hit the rev limiter, and it has never had the rev limited bypassed.
MSX 125 Big End Bearing Pictures, MSX 125 Big End Bearing Images, MSX 125 Big End Bearing Photos, MSX 125 Big End Bearing Videos - Video - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting
This failure may be worth watching in case more people start having problems if more of us reach higher mileages, or more tuning work is done.
UPDATE: Another bike has just blown its bigend bearing after just 1,600 miles - 1,000 miles after having a 143cc takegawa kit fitted. This does not bode well for the built quality of this crank. For example, most oil-cooled Suzukis (e.g. Bandit) engines can easily handle 20-30% capacity increases without shedding their big end bearings every 5 minutes.
UPDATE (AGAIN): It seems on further investigation it wasn't a blown big end bearing, it was his Takegawa 143cc kit - the piston has seized so badly that it had ended up VERY loose and slappy. The noise was so bad that it sounded as bad as a blown big end bearing.
MSX 125 Big End Bearing Pictures, MSX 125 Big End Bearing Images, MSX 125 Big End Bearing Photos, MSX 125 Big End Bearing Videos - Video - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting
This failure may be worth watching in case more people start having problems if more of us reach higher mileages, or more tuning work is done.
UPDATE: Another bike has just blown its bigend bearing after just 1,600 miles - 1,000 miles after having a 143cc takegawa kit fitted. This does not bode well for the built quality of this crank. For example, most oil-cooled Suzukis (e.g. Bandit) engines can easily handle 20-30% capacity increases without shedding their big end bearings every 5 minutes.
UPDATE (AGAIN): It seems on further investigation it wasn't a blown big end bearing, it was his Takegawa 143cc kit - the piston has seized so badly that it had ended up VERY loose and slappy. The noise was so bad that it sounded as bad as a blown big end bearing.
