Bigger jet?
Bigger jet?Hi everyone, I have a 1963 Honda Dream that we've restored. I have been riding the heck out of my bike, but a few weekends ago, I ventured out further than I have in the past. I was heading out towards the coast, and when I would start up an incline, my bike would act like it was starving for fuel. Then, when I was crested at the top of hill, or going down the hill everything seemed fine again. So limped it home, and it's been running fine around town. So today, the sun was out in full force, so I decided to ride my bike to an appointment two towns over (approx. 14 miles one way). It ran great on the way there, but on the way back I decided I wanted to throttle out and see how fast the bike could go. I got up to about 54 mph and it started "coughing" again. It spuddered and would die.... i'd pull over and get it started and then it would cough somemore, and surge then cough surge and cough again. I decided to ride it to my inlaws and let it sit for a bit. I let it sit for about 45 minutes and rode it home, and it ran fine again. Does anyone have an idea of what I should been looking for? My gas tank was about 1/3 to 1/2 full, I loosened the gas cap to see if it was vapor lock, no difference. Any one have this same issue? How fast can these bikes go?
Hi KellieLyyne,
The dream can supposedly hit 100, though I dont know how accurate that is, I know that they can cruise at 70. There could be several issues that would cause your bike to perform mildly. #1 thing to check is timing, at higher speeds, the points have less time to hit the spark therefore wont push you any further if slightly off. I recommend installing the electronic ignition that is featured on this site for an overall performance upgrade. #2 is carburation, are they clean, are the floats set to the right level, is the main jet the correct size. carbs are so precise that the slightest blockage of air or gas will give you that sputter. #3 also check the oil level, if the bike is overheating its not going to perform as you want it to. hope that helps, Ian
Re: Bigger jet?YA can try this next time this happens.
When the problem is happening remove the gas cap as ya ride and see if the problem goes away. ........lm
Okay LM I will give that a try today, and Ian thanks, I wasn't sure if I needed to rejet the carb since Im running aftermarket exhaust. I have the dunstall reverse cone exhaust on it now. When we first rebuilt the carb we used a rebuild kit, and after having issues with it, we went back to the original hardware. Like I said it runs great on flat ground, but give me a hill, and I feel like an old motorhome trying to make it up a hill climb! I will definitely need to figure this out before going for a long ride any time soon. I check my oil regularly, and I will have my hubby check my timing. It's time for an oil change anyways, and I want him to rebuild my clutch (slippage). So I guess its a good time to take a good look at that eletronic ignition. Thanks again.
I'd say start with the 140's from ebay that bill silver is selling, and drop the needle to the 5th position to give its richest setting. I'm in san francisco all the time, and my superhawk is climbing the hills here just fine.
If you are still running too rich, you can have the jets machined to a larger bore so as to increase fuel at full and drop your needle down again to the fourth. you can also try the jets are us website for cb77 jets, but they might not fit on your dream. good luck, and if you are ever down in sf send me a pm and we could go for a ride The Dream came with a 120 main and my guess is a 140 will be way too rich even at sea level.
130 was way too rich for mine even with opened up mufflers and opened up air filter. The top speed of the 305 Dream is listed as 87 mph in the owners manual, and that is probably with a 95# rider crouched over in the Bonneville position for who knows how long! Any grade (even slight) or headwind will lower that speed considerably. Since you describe it as an intermittant problem, my guess is it's a fuel supply problem as LM indicated. While you are maxed out on the throttle, and experiencing the loss of power, try reaching down and slightly closing the choke. If that causes the power/speed to increase, then you may have too small a main jet. 66 dream, 78 cb750k, 02fz1, 09 wing
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
