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HONDA TL 250 Bials 1975 Project
Part 4: Test
The carb has been cleaned by Honda Taiana via ultra sound, looked pretty clean now. Graeme Barden, a TL 250 owner from UK, advised me in an e-mail to use a 120 main jet instead the 115 original one. Honda Taiana produced it out of his magical drawers!
In front of my home, the Honda was quite powerful til half throttle, but didn' rev, no power at open throttle...So, I changed the 120 main jet against the 115. I also checked the ignition timing with a stroboscopic light. Ignitiion was before the ignition markt, advanced with revs (mechnaical automatic adjustment). Should be o.k.
On a warm September evening, I went to my local trainings ground to test different carb and ignition settings. The Honda was heavy as described, but til 1/2 throttle quite powerful. A wheele at 1/2/3 gear an easy task, but it didn't rev, but sputed when closing throttle. I tried different ignition timings. An advanced (early ignition) seemed to improve the power a bit. I drove around a little bit, but climbing hills was only posilbe at low revs. Maybe the cam chain was offset by one teeth? It was getting dark and I decided to rev the beast without gear. It shot, spouted, and then an explosion with black smoke came out of the little muffler in the exhaust pipe...the engine reved now like hell and the it was more noiy than before. Something broken? No. Maybe a dead mouse in the muffler? Anyway, the engine delivered now power and I could climbe and rev the hills. Wow! Almost like my new Honda 4RT...ok. almost, but much better than before. In middle throttle, there was a hesitation, but the darkness prevented me from further fine tuning. Maybe I need an oriiginal muffler from ebay (Eddy was always riding with hugh mufflers) or I could fit an alu TL 125 one from Sammy Miller.
27 September 2005