imported post
In your case, not knowing the maintenance history of the bike and it being an '89 model, I would definitely advise changing the belts. Just for the peace of mind.
Here in the USA, Honda recommends changing them every 100,000 miles. And, I haven't heard of an officialtime recommendation.
A local mechanic told me the other day that he regularly performed maintenance on a '94SE that had in excess of 600,000 miles on it. He said that the owner had the oil changed every 3,000 miles, whether around town or on a trip. I asked him how many timing belts had been replaced and he said only 2. The original belt was replaced at a little over 300,000 miles. He said that the belt was pretty ragged looking and should have been replaced well before it finally was.
Most folks who change the belts at 50, 60, or 70,000 miles say that the old belts look just as good as the new belts that they are replacing them with.
I now have 32,000 miles on my bikeand I plan to replace the belts at 100,000 miles or 10 years, which ever comes first.
However, as always, YMMV.
Ride safe,
Bill