maxalliance
New Member
Hey, my name is Jordan and I'd like to start by saying thank you to the committed members of this community who offer sound advice in a friendly manner. I've spent a lot of time reading through the forum and have been fortunate to have found all my questions already asked and answered in clear, simple terms (I'm a noob).
This is actually my second kit. I bagged on my last one for over a year before it went and I decided to build a new one.
I drove my last one pretty hard in pretty severe conditions so I'm really surprised it lasted as long as it did but now I am looking to make something more powerful as my last kit was second-hand and likely never ran properly.
I've got a GT5-A [66cc slant] from here : http://www.motorizedbicycle.ca and assembled everything myself onto a Nakamura Trailback.
It was a very tight squeeze and unfortunately required drilling through the down-tube to install it (I ordered a large universal U bolt mount but it was still way to small).
I purchased a boost bottle kit as well but there is NO way it will fit, even with my intake offset pipe, it's very close.
I even had to take the top off the head and turn it around so that the spark plug pertruded toward the front of the bike.
I also purchased the NT Speed carb and installed it right away.
It took some tinkering to get it started at first but I was easy on it during the breakin and noticed that it already had more low end pull during breakin than my old engine (same model) ever did.
This performance, however, was short lived. After the first 2 tanks (mixed 16:1) I leaned my mixture out to about 24:1 and swapped my stock plug for a BH6S.
Shortly after it seemed to lose a lot of power in the low and but still pulled hard at 3/4 - WOT.
I tried switching back to the old plug and it didn't make a difference.
I spent a lot of time reading online and learned about 4 stroking. It seemed to match the description so I moved the C clip up on notch (to second from top) on my carb and didn't notice a difference. My plug still looked pretty dark/oily.
I moved the clip up again (to the top) and now it runs perfectly (so it seems). Still 4 strokes a little now then and and idles high sometimes but otherwise runs and sounds great.
My concern is that my plug now looks much lighter than before. I wouldn't say it's chalky but it's not as wet and is a medium-light brown. I don't know how light is too light though and find it hard comparing it to photos online.
I've included a photo of it here :
Again, WOT has never been a concern, it has always pulled smooth without 4 stroking. only at low -mid throttle did it bog.
It runs great now but I worry that it may be too lean.
Are there any other tricks or tests I can perform to find out of it may be running too lean? Do any of you use the leanest setting? What problems should I look for?
I'm using the stock jet that came in my Speed carb and would like to avoid changing the jets as i plan to get a new carb in the near future. I am using the stock exhaust and have since switched back to the BH6S. I plan to get an irodium extended tip, maybe a 7. Should this help prevent wear/damage when running at its leanest? Which number would be best?
Also, I've gotta ask. I know that many will say it's a no-no but I haven't read many reviews from people that actually owned them. I'm honestly considering getting a kit, even just to say it's got nos. I know there are concerns with leaning out your ratio too far by injecting dry nos into the intake manifold without added fuel however I read somewhere about running it through the carb air intake instead. Has anyone tried this or is able to provide some insight as to whether or not it may help wear?
http://www.piratecycles1.com/nikitw5reins.html
or this
http://www.bikeberry.com/nitrous-oxide-kit.html
Thanks, - Jordan
This is actually my second kit. I bagged on my last one for over a year before it went and I decided to build a new one.
I drove my last one pretty hard in pretty severe conditions so I'm really surprised it lasted as long as it did but now I am looking to make something more powerful as my last kit was second-hand and likely never ran properly.
I've got a GT5-A [66cc slant] from here : http://www.motorizedbicycle.ca and assembled everything myself onto a Nakamura Trailback.
It was a very tight squeeze and unfortunately required drilling through the down-tube to install it (I ordered a large universal U bolt mount but it was still way to small).
I purchased a boost bottle kit as well but there is NO way it will fit, even with my intake offset pipe, it's very close.
I even had to take the top off the head and turn it around so that the spark plug pertruded toward the front of the bike.
I also purchased the NT Speed carb and installed it right away.
It took some tinkering to get it started at first but I was easy on it during the breakin and noticed that it already had more low end pull during breakin than my old engine (same model) ever did.
This performance, however, was short lived. After the first 2 tanks (mixed 16:1) I leaned my mixture out to about 24:1 and swapped my stock plug for a BH6S.
Shortly after it seemed to lose a lot of power in the low and but still pulled hard at 3/4 - WOT.
I tried switching back to the old plug and it didn't make a difference.
I spent a lot of time reading online and learned about 4 stroking. It seemed to match the description so I moved the C clip up on notch (to second from top) on my carb and didn't notice a difference. My plug still looked pretty dark/oily.
I moved the clip up again (to the top) and now it runs perfectly (so it seems). Still 4 strokes a little now then and and idles high sometimes but otherwise runs and sounds great.
My concern is that my plug now looks much lighter than before. I wouldn't say it's chalky but it's not as wet and is a medium-light brown. I don't know how light is too light though and find it hard comparing it to photos online.
I've included a photo of it here :
Again, WOT has never been a concern, it has always pulled smooth without 4 stroking. only at low -mid throttle did it bog.
It runs great now but I worry that it may be too lean.
Are there any other tricks or tests I can perform to find out of it may be running too lean? Do any of you use the leanest setting? What problems should I look for?
I'm using the stock jet that came in my Speed carb and would like to avoid changing the jets as i plan to get a new carb in the near future. I am using the stock exhaust and have since switched back to the BH6S. I plan to get an irodium extended tip, maybe a 7. Should this help prevent wear/damage when running at its leanest? Which number would be best?
Also, I've gotta ask. I know that many will say it's a no-no but I haven't read many reviews from people that actually owned them. I'm honestly considering getting a kit, even just to say it's got nos. I know there are concerns with leaning out your ratio too far by injecting dry nos into the intake manifold without added fuel however I read somewhere about running it through the carb air intake instead. Has anyone tried this or is able to provide some insight as to whether or not it may help wear?
http://www.piratecycles1.com/nikitw5reins.html
or this
http://www.bikeberry.com/nitrous-oxide-kit.html
Thanks, - Jordan
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